{"id":20001,"date":"2025-12-31T09:00:00","date_gmt":"2025-12-31T05:30:00","guid":{"rendered":"https:\/\/webdade.com\/blog\/?p=20001"},"modified":"2026-01-19T11:04:25","modified_gmt":"2026-01-19T07:34:25","slug":"domain-com-fix-error-421","status":"publish","type":"post","link":"https:\/\/webdade.com\/blog\/domain-com-fix-error-421","title":{"rendered":"\u062e\u0637\u0627 Server replied: 421 Unexpected failure, please try later"},"content":{"rendered":"\n<div id=\"gspb_text-id-gsbp-6f34c78\" class=\"gspb_text gspb_text-id-gsbp-6f34c78 \">\u062e\u0637\u0627\u06cc <strong>Server replied: 421 Unexpected failure, please try later<\/strong> \u06cc\u0627 \u062e\u0637\u0627 421 \u06cc\u06a9\u06cc \u0627\u0632 \u062e\u0637\u0627\u0647\u0627\u06cc \u0631\u0627\u06cc\u062c \u062f\u0631 \u062f\u0646\u06cc\u0627\u06cc \u0648\u0628 \u0648 \u0633\u0631\u0648\u0631\u0647\u0627 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u062e\u0637\u0627 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u062f\u0631 \u062f\u0648 \u062d\u0648\u0632\u0647 \u0627\u0635\u0644\u06cc \u06cc\u0639\u0646\u06cc <strong>FTP (\u0627\u0646\u062a\u0642\u0627\u0644 \u0641\u0627\u06cc\u0644)<\/strong> \u0648 <strong>SMTP (\u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644)<\/strong> \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f. \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0639\u0627\u062f\u06cc\u060c \u0648\u0628\u200c\u0645\u0633\u062a\u0631\u0647\u0627 \u0648 \u062d\u062a\u06cc \u0645\u062f\u06cc\u0631\u0627\u0646 \u0633\u06cc\u0633\u062a\u0645 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u062f\u0631 \u0647\u0646\u06af\u0627\u0645 \u0627\u062a\u0635\u0627\u0644 \u0628\u0647 \u0633\u0631\u0648\u0631 \u06cc\u0627 \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0628\u0627 \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644 \u0645\u0648\u0627\u062c\u0647 \u0634\u0648\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0627\u0632 \u0628\u0644\u0627\u06af \u0648\u0628\u200c\u062f\u0627\u062f\u0647 \u0628\u0647\u200c\u0635\u0648\u0631\u062a \u062c\u0627\u0645\u0639 \u0648 \u06af\u0627\u0645\u200c\u0628\u0647\u200c\u06af\u0627\u0645 \u0628\u0647 \u0628\u0631\u0631\u0633\u06cc \u062f\u0644\u0627\u06cc\u0644\u060c \u062a\u0641\u0627\u0648\u062a\u200c\u0647\u0627 \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0631\u0641\u0639 \u062e\u0637\u0627 421 \u0645\u06cc\u200c\u067e\u0631\u062f\u0627\u0632\u06cc\u0645 \u062a\u0627 \u0628\u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0647\u200c\u0631\u0627\u062d\u062a\u06cc \u0622\u0646 \u0631\u0627 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u0648 \u0628\u0631\u0637\u0631\u0641 \u06a9\u0646\u06cc\u062f.<\/div>\n\n\n\n<div id=\"gspb_text-id-gsbp-6fe7ab9\" class=\"gspb_text gspb_text-id-gsbp-6fe7ab9 \"><strong>\ud83d\udca1 \u0646\u06a9\u0627\u062a \u0645\u0647\u0645 \u062f\u0631\u0628\u0627\u0631\u0647 \u0631\u0641\u0639 \u062e\u0637\u0627 421<\/strong>:<\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u062e\u0637\u0627\u06cc 421 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0645\u0648\u0642\u062a \u0627\u0633\u062a \u0648 \u0628\u0647 \u062f\u0644\u06cc\u0644 <strong>Server Overload 421<\/strong> \u06cc\u0627 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc\u200c\u0634\u0648\u062f.<\/li>\n\n\n\n<li>\u062f\u0631 FTP \u0628\u06cc\u0634\u062a\u0631 \u0646\u0627\u0634\u06cc \u0627\u0632 Too Many Connections \u06cc\u0627 \u0646\u0628\u0648\u062f \u062a\u0646\u0638\u06cc\u0645\u0627\u062a Passive Mode FTP \u0627\u0633\u062a.<\/li>\n\n\n\n<li>\u062f\u0631 SMTP \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u062e\u0627\u0637\u0631 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u06cc\u0627 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0627\u0634\u062a\u0628\u0627\u0647 \u067e\u0648\u0631\u062a \u0628\u0627\u0634\u062f.<\/li>\n\n\n\n<li>\u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af\u200c\u0647\u0627 \u0648 \u0645\u0646\u0627\u0628\u0639 \u0633\u0631\u0648\u0631 \u0628\u0631\u0627\u06cc \u06cc\u0627\u0641\u062a\u0646 \u0639\u0644\u062a \u0627\u0635\u0644\u06cc \u0631\u0641\u0639 \u062e\u0637\u0627 421 \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-container gspb_container gspb_container-gsbp-ece0ea6\" id=\"gspb_container-id-gsbp-ece0ea6\">\n<div id=\"gspb_text-id-gsbp-67df801\" class=\"gspb_text gspb_text-id-gsbp-67df801 \">\ud83d\udca1 \u0628\u06cc\u0634\u062a\u0631 \u0628\u062f\u0627\u0646\u06cc\u062f: <a href=\"https:\/\/webdade.com\/blog\/email-protocols-pop3-imap-smtp-ports\" data-type=\"link\" data-id=\"https:\/\/webdade.com\/blog\/email-protocols-pop3-imap-smtp-ports\"><strong>\u0622\u0634\u0646\u0627\u06cc\u06cc \u0628\u0627 \u067e\u0631\u0648\u062a\u06a9\u0644 \u0647\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644: POP3 IMAP \u0648 SMTP \u0648 \u067e\u0648\u0631\u062a \u0647\u0627\u06cc \u0622\u0646\u0647\u0627<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-container gspb_container gspb_container-gsbp-3090342\" id=\"gspb_container-id-gsbp-3090342\">\n<p id=\"gspb_heading-id-gsbp-4f2eab8\" class=\"gspb_heading gspb_heading-id-gsbp-4f2eab8 \"><strong>\u0622\u0646\u0686\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0645\u06cc\u200c\u062e\u0648\u0627\u0646\u06cc\u062f:<\/strong><\/p>\n\n\n\n<div class=\"wp-block-greenshift-blocks-toc gs-toc gspb_toc-id-gsbp-9ed45ff\" id=\"gspb_toc-id-gsbp-9ed45ff\" data-offset=\"100\" itemscope itemtype=\"\"><div class=\"gs-autolist\"><div class=\"gs-autolist-item\" itemscope><span class=\"gs-autolist-number\">1<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u062e\u0637\u0627\u06cc 421 \u0686\u06cc\u0633\u062a \u0648 \u0686\u0631\u0627 \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f\u061f\"\/><a class=\"gs-scrollto\" href=\"#what-is-error-421-and-causes\">\u062e\u0637\u0627\u06cc 421 \u0686\u06cc\u0633\u062a \u0648 \u0686\u0631\u0627 \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f\u061f<\/a><\/span><\/div><div class=\"gs-autolist-item\" itemscope><span class=\"gs-autolist-number\">2<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 FTP (File Transfer Protocol)\"\/><a class=\"gs-scrollto\" href=\"#fix-error-421-in-ftp\">\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 FTP (File Transfer Protocol)<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">2.1<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 FTP\"\/><a class=\"gs-scrollto\" href=\"#reasons-for-ftp-error-421\">\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 FTP<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">2.2<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)\"\/><a class=\"gs-scrollto\" href=\"#ftp-client-side-solutions\">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">2.3<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)\"\/><a class=\"gs-scrollto\" href=\"#ftp-server-side-solutions\">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)<\/a><\/span><\/div><div class=\"gs-autolist-item\" itemscope><span class=\"gs-autolist-number\">3<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 SMTP (\u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644)\"\/><a class=\"gs-scrollto\" href=\"#fix-error-421-in-smtp-email\">\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 SMTP (\u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644)<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">3.1<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 SMTP\"\/><a class=\"gs-scrollto\" href=\"#reasons-for-smtp-error-421\">\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 SMTP<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">3.2<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)\"\/><a class=\"gs-scrollto\" href=\"#smtp-client-side-solutions\">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">3.3<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)\"\/><a class=\"gs-scrollto\" href=\"#smtp-server-side-solutions\">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)<\/a><\/span><\/div><div class=\"gs-autolist-item\" itemscope><span class=\"gs-autolist-number\">4<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0627\u0642\u062f\u0627\u0645\u0627\u062a \u067e\u06cc\u0634\u06af\u06cc\u0631\u0627\u0646\u0647 \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u062e\u0637\u0627\u06cc 421\"\/><a class=\"gs-scrollto\" href=\"#prevent-error-421-future\">\u0627\u0642\u062f\u0627\u0645\u0627\u062a \u067e\u06cc\u0634\u06af\u06cc\u0631\u0627\u0646\u0647 \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u062e\u0637\u0627\u06cc 421<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">4.1<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0645\u062b\u0627\u0644 \u0648\u0627\u0642\u0639\u06cc \u0627\u0632 \u062f\u0631\u06cc\u0627\u0641\u062a \u062e\u0637\u0627 421: Unexpected failure\"\/><a class=\"gs-scrollto\" href=\"#real-world-example-error-421\">\u0645\u062b\u0627\u0644 \u0648\u0627\u0642\u0639\u06cc \u0627\u0632 \u062f\u0631\u06cc\u0627\u0641\u062a \u062e\u0637\u0627 421: Unexpected failure<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">4.2<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0646\u062a\u06cc\u062c\u0647\u200c\u06af\u06cc\u0631\u06cc:\u200c \u062e\u0637\u0627 Server replied: 421 Unexpected failure, please try later\"\/><a class=\"gs-scrollto\" href=\"#conclusion-error-421-unexpected-failure\">\u0646\u062a\u06cc\u062c\u0647\u200c\u06af\u06cc\u0631\u06cc:\u200c \u062e\u0637\u0627 Server replied: 421 Unexpected failure, please try later<\/a><\/span><\/div><div class=\"gs-autolist-item gs_sub_heading\" itemscope><span class=\"gs-autolist-number\">4.3<\/span><span class=\"gs-autolist-title\"><meta itemprop=\"name\" content=\"\u0633\u0648\u0627\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644 \u0627\u0632 \u0631\u0641\u0639 \u062e\u0637\u0627 421\"\/><a class=\"gs-scrollto\" href=\"#faq-error-421\">\u0633\u0648\u0627\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644 \u0627\u0632 \u0631\u0641\u0639 \u062e\u0637\u0627 421<\/a><\/span><\/div><\/div><\/div>\n<\/div>\n\n\n\n<div id=\"what-is-error-421-and-causes\"><\/div><h2 id=\"gspb_heading-id-gsbp-52f3323\" class=\"gspb_heading gspb_heading-id-gsbp-52f3323 \">\u062e\u0637\u0627\u06cc 421 \u0686\u06cc\u0633\u062a \u0648 \u0686\u0631\u0627 \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f\u061f<\/h2>\n\n\n\n<div id=\"gspb_text-id-gsbp-5caa079\" class=\"gspb_text gspb_text-id-gsbp-5caa079 \"><strong>\u062e\u0637\u0627 421<\/strong> \u0628\u0647\u200c\u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 <strong>\u062e\u0637\u0627\u06cc \u0645\u0648\u0642\u062a (Temporary Error)<\/strong> \u0634\u0646\u0627\u062e\u062a\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0627\u06cc\u0646 \u062e\u0637\u0627 \u0628\u0647 \u0645\u0639\u0646\u0627\u06cc \u0622\u0646 \u0627\u0633\u062a \u06a9\u0647 \u0633\u0631\u0648\u0631 \u0628\u0647\u200c\u0637\u0648\u0631 \u0645\u0648\u0642\u062a \u0642\u0627\u062f\u0631 \u0628\u0647 \u067e\u0627\u0633\u062e\u06af\u0648\u06cc\u06cc \u0646\u06cc\u0633\u062a. \u0627\u06cc\u0646 \u0645\u0634\u06a9\u0644 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0646\u0627\u0634\u06cc \u0627\u0632 \u0645\u0648\u0627\u0631\u062f \u0632\u06cc\u0631 \u0628\u0627\u0634\u062f:<\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Server Overload 421: \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f \u0631\u0648\u06cc \u0633\u0631\u0648\u0631<\/li>\n\n\n\n<li>\u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 (Rate Limit)<\/li>\n\n\n\n<li>\u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0646\u0627\u062f\u0631\u0633\u062a \u06a9\u0644\u0627\u06cc\u0646\u062a \u06cc\u0627 \u0641\u0627\u06cc\u0631\u0648\u0627\u0644<\/li>\n\n\n\n<li>\u06a9\u0645\u0628\u0648\u062f \u0645\u0646\u0627\u0628\u0639 \u0633\u0631\u0648\u0631 (RAM \u06cc\u0627 CPU)<\/li>\n<\/ul>\n\n\n\n<div id=\"gspb_text-id-gsbp-08ca2a8\" class=\"gspb_text gspb_text-id-gsbp-08ca2a8 \">\u0628\u0647 \u0632\u0628\u0627\u0646 \u0633\u0627\u062f\u0647\u060c \u0648\u0642\u062a\u06cc \u0633\u0631\u0648\u0631 \u0646\u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u06a9\u0627\u0631\u0628\u0631 \u067e\u0627\u0633\u062e \u062f\u0647\u062f\u060c \u062e\u0637\u0627\u06cc 421 \u0638\u0627\u0647\u0631 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-image gspb_image gspb_image-id-gsbp-ff0d7e0\" id=\"gspb_image-id-gsbp-ff0d7e0\"><img decoding=\"async\" src=\"https:\/\/webdade.com\/blog\/wp-content\/uploads\/2025\/10\/domain-com-fix-error-4212.jpg\" data-src=\"\" alt=\"\u062e\u0637\u0627 421\" loading=\"lazy\" width=\"910\" height=\"492\"\/><\/div>\n\n\n\n<div id=\"fix-error-421-in-ftp\"><\/div><h2 id=\"gspb_heading-id-gsbp-111f57f\" class=\"gspb_heading gspb_heading-id-gsbp-111f57f \">\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 FTP (File Transfer Protocol)<\/h2>\n\n\n\n<div id=\"gspb_text-id-gsbp-f617a99\" class=\"gspb_text gspb_text-id-gsbp-f617a99 \">\u0627\u06cc\u0646 \u0628\u062e\u0634 \u0628\u0647 \u0635\u0648\u0631\u062a \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0631\u0648\u06cc \u0645\u0634\u06a9\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644 \u0627\u062a\u0635\u0627\u0644 FTP \u0648 \u0631\u0627\u0647\u06a9\u0627\u0631\u0647\u0627\u06cc \u0639\u0645\u0644\u06cc \u062a\u0645\u0631\u06a9\u0632 \u062f\u0627\u0631\u062f. \u06a9\u0627\u0631\u0628\u0631 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0627 \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u062a\u0639\u062f\u0627\u062f \u06a9\u0627\u0646\u06a9\u0634\u0646\u200c\u0647\u0627\u060c \u0641\u0639\u0627\u0644\u200c\u0633\u0627\u0632\u06cc Passive Mode \u0648 \u0628\u0631\u0631\u0633\u06cc \u0641\u0627\u06cc\u0631\u0648\u0627\u0644\u060c \u062f\u0631 \u0628\u0633\u06cc\u0627\u0631\u06cc \u0627\u0632 \u0645\u0648\u0627\u0631\u062f \u062e\u0637\u0627 421 \u0631\u0627 \u0631\u0641\u0639 \u06a9\u0646\u062f. \u0627\u0632 \u0637\u0631\u0641 \u062f\u06cc\u06af\u0631 \u0645\u062f\u06cc\u0631 \u0633\u0631\u0648\u0631 \u0646\u06cc\u0632 \u0628\u0627\u06cc\u062f \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0627\u0636\u0627\u0641\u06cc \u0631\u0627 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u067e\u0646\u0644 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0642\u0637\u0639 \u06a9\u0631\u062f\u0647 \u0648 \u0644\u0627\u06af\u200c\u0647\u0627 \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u062f \u062a\u0627 \u062f\u0644\u06cc\u0644 \u0627\u0635\u0644\u06cc \u0645\u0634\u062e\u0635 \u0634\u0648\u062f.<\/div>\n\n\n\n<div id=\"reasons-for-ftp-error-421\"><\/div><h3 id=\"gspb_heading-id-gsbp-18c4fc7\" class=\"gspb_heading gspb_heading-id-gsbp-18c4fc7 \">\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 FTP<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Too Many Connections: \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f \u0628\u0648\u062f\u0646 \u062a\u0639\u062f\u0627\u062f \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0647\u0645\u0632\u0645\u0627\u0646<\/li>\n\n\n\n<li>Idle Connections: \u0628\u0627\u0632 \u0645\u0627\u0646\u062f\u0646 \u06a9\u0627\u0646\u06a9\u0634\u0646\u200c\u0647\u0627\u06cc \u0628\u0644\u0627\u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/li>\n\n\n\n<li>\u0645\u0634\u06a9\u0644\u0627\u062a \u0641\u0627\u06cc\u0631\u0648\u0627\u0644 \u06cc\u0627 \u0639\u062f\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062d\u0627\u0644\u062a Passive Mode FTP<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-greenshift-blocks-container gspb_container gspb_container-gsbp-829a48d\" id=\"gspb_container-id-gsbp-829a48d\">\n<div id=\"gspb_text-id-gsbp-b4e12f3\" class=\"gspb_text gspb_text-id-gsbp-b4e12f3 \">\ud83d\udca1 \u0628\u06cc\u0634\u062a\u0631 \u0628\u062f\u0627\u0646\u06cc\u062f:<a href=\"https:\/\/webdade.com\/blog\/domain-com-fix-too-many-connections\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/webdade.com\/blog\/domain-com-fix-too-many-connections\" rel=\"noreferrer noopener\"> <strong>\u0631\u0641\u0639 \u062e\u0637\u0627 Too many connections<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<div id=\"ftp-client-side-solutions\"><\/div><h3 id=\"gspb_heading-id-gsbp-8316dea\" class=\"gspb_heading gspb_heading-id-gsbp-8316dea \">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0648\u0631\u0648\u062f \u0628\u0647 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u06a9\u0644\u0627\u06cc\u0646\u062a\u200c\u0647\u0627\u06cc\u06cc \u0645\u062b\u0644 FileZilla \u0648 \u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u062d\u062f\u0627\u06a9\u062b\u0631 \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0647\u0645\u0632\u0645\u0627\u0646 \u0628\u0647 2 \u06cc\u0627 3 \u0639\u062f\u062f.<\/li>\n\n\n\n<li>\u0641\u0639\u0627\u0644 \u06a9\u0631\u062f\u0646 \u06af\u0632\u06cc\u0646\u0647 Passive Mode \u062f\u0631 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a FTP.<\/li>\n\n\n\n<li>\u0628\u0631\u0631\u0633\u06cc \u0622\u0646\u062a\u06cc\u200c\u0648\u06cc\u0631\u0648\u0633 \u0648 \u0641\u0627\u06cc\u0631\u0648\u0627\u0644 \u0645\u062d\u0644\u06cc \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0628\u0644\u0627\u06a9 \u0634\u062f\u0646 \u067e\u0648\u0631\u062a FTP.<\/li>\n<\/ul>\n\n\n\n<div id=\"ftp-server-side-solutions\"><\/div><h3 id=\"gspb_heading-id-gsbp-c499e67\" class=\"gspb_heading gspb_heading-id-gsbp-c499e67 \">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0648\u0631\u0648\u062f \u0628\u0647 cPanel \u2192 FTP Connections \u0648 \u0642\u0637\u0639 \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0627\u0636\u0627\u0641\u0647.<\/li>\n\n\n\n<li>\u062a\u0646\u0638\u06cc\u0645 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a\u200c\u0647\u0627 \u062f\u0631 WHM \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 overload.<\/li>\n\n\n\n<li>\u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af\u200c\u0647\u0627\u06cc FTP (\u0645\u0627\u0646\u0646\u062f \/var\/log\/messages \u06cc\u0627 pure-ftpd logs) \u0627\u0632 \u0637\u0631\u06cc\u0642 \u062f\u0633\u062a\u0648\u0631\u0627\u062a \u0644\u06cc\u0646\u0648\u06a9\u0633 \u0645\u0627\u0646\u0646\u062f \u0645\u0648\u0627\u0631\u062f \u0632\u06cc\u0631 \u0634\u0646\u0627\u0633\u0627\u06cc\u06cc \u06a9\u0631\u062f.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro padding-bottom-disabled cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#f6f6f4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#282A36\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#282A36;display:none;background-color:#f6f6f4\" aria-label=\"Copy\" data-copied-text=\"Copied!\" data-has-text-button=\"textSimple\" data-inside-header-type=\"headlights\" aria-live=\"polite\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>tail -f \/var\/log\/messages<\/textarea><\/pre><span class=\"cbp-btn-text\">Copy<\/span><\/span><pre class=\"shiki dracula-soft\" style=\"background-color: #282A36\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #62E884\">tail<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #BF9EEE\">-f<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #E7EE98\">\/var\/log\/messages<\/span><\/span><\/code><\/pre><span style=\"display:flex;align-items:flex-end;padding:10px;width:100%;justify-content:flex-start;background-color:#282A36;color:#ebebe6;font-size:12px;line-height:1;position:relative\"> <\/span><\/div>\n\n\n\n<div id=\"gspb_text-id-gsbp-a0e2294\" class=\"gspb_text gspb_text-id-gsbp-a0e2294 \">\u06cc\u0627:<\/div>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro padding-bottom-disabled cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#f6f6f4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#282A36\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#282A36;display:none;background-color:#f6f6f4\" aria-label=\"Copy\" data-copied-text=\"Copied!\" data-has-text-button=\"textSimple\" data-inside-header-type=\"headlights\" aria-live=\"polite\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>cat \/var\/log\/pure-ftpd.log<\/textarea><\/pre><span class=\"cbp-btn-text\">Copy<\/span><\/span><pre class=\"shiki dracula-soft\" style=\"background-color: #282A36\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #62E884\">cat<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #E7EE98\">\/var\/log\/pure-ftpd.log<\/span><\/span><\/code><\/pre><span style=\"display:flex;align-items:flex-end;padding:10px;width:100%;justify-content:flex-start;background-color:#282A36;color:#ebebe6;font-size:12px;line-height:1;position:relative\"> <\/span><\/div>\n\n\n\n<div id=\"fix-error-421-in-smtp-email\"><\/div><h2 id=\"gspb_heading-id-gsbp-a4efe5f\" class=\"gspb_heading gspb_heading-id-gsbp-a4efe5f \">\u0631\u0641\u0639 \u062e\u0637\u0627 421 \u062f\u0631 SMTP (\u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644)<\/h2>\n\n\n\n<div id=\"gspb_text-id-gsbp-c683397\" class=\"gspb_text gspb_text-id-gsbp-c683397 \">\u0627\u06cc\u0646 \u0628\u062e\u0634 \u0628\u0647 \u0635\u0648\u0631\u062a \u0639\u0645\u0644\u06cc \u062a\u0648\u0636\u06cc\u062d \u0645\u06cc\u200c\u062f\u0647\u062f \u06a9\u0647 \u0686\u0631\u0627 \u062e\u0637\u0627 421 \u062f\u0631 \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f \u0648 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0622\u0646 \u0631\u0627 \u0631\u0641\u0639 \u06a9\u0631\u062f. \u0645\u062f\u06cc\u0631\u0627\u0646 \u0633\u06cc\u0633\u062a\u0645 \u0628\u0627\u06cc\u062f \u0644\u0627\u06af\u200c\u0647\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644 \u0645\u062b\u0644 exim_mainlog \u0631\u0627 \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u0646\u062f\u060c \u0645\u062d\u062f\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0631\u0627 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0631\u062f\u0647 \u0648 \u0645\u0646\u0627\u0628\u0639 \u0633\u0631\u0648\u0631 \u0631\u0627 \u067e\u0627\u06cc\u0634 \u06a9\u0646\u0646\u062f. \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0646\u06cc\u0632 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0627 \u0627\u0635\u0644\u0627\u062d \u067e\u0648\u0631\u062a SMTP\u060c \u0628\u0631\u0631\u0633\u06cc \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0631\u0645\u0632\u0646\u06af\u0627\u0631\u06cc \u0648 \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u062a\u0635\u0627\u0644 \u0627\u06cc\u0646\u062a\u0631\u0646\u062a \u067e\u0627\u06cc\u062f\u0627\u0631\u060c \u0645\u0634\u06a9\u0644 \u0631\u0627 \u0628\u0631\u0637\u0631\u0641 \u06a9\u0646\u0646\u062f.<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-image gspb_image gspb_image-id-gsbp-84c8036\" id=\"gspb_image-id-gsbp-84c8036\"><img decoding=\"async\" src=\"https:\/\/webdade.com\/blog\/wp-content\/uploads\/2025\/10\/domain-com-fix-error-4211.jpg\" data-src=\"\" alt=\"Server replied 421\" loading=\"lazy\" width=\"910\" height=\"492\"\/><\/div>\n\n\n\n<div id=\"reasons-for-smtp-error-421\"><\/div><h3 id=\"gspb_heading-id-gsbp-c0e42ac\" class=\"gspb_heading gspb_heading-id-gsbp-c0e42ac \">\u062f\u0644\u0627\u06cc\u0644 \u0628\u0631\u0648\u0632 \u062e\u0637\u0627 \u062f\u0631 SMTP<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Server Overload \u0628\u0647 \u0639\u0644\u062a \u062d\u062c\u0645 \u0628\u0627\u0644\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644\u200c\u0647\u0627<\/li>\n\n\n\n<li>\u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0627\u0633\u067e\u0645<\/li>\n\n\n\n<li>\u0628\u0644\u0627\u06a9 \u0634\u062f\u0646 \u067e\u0648\u0631\u062a\u200c\u0647\u0627 \u062a\u0648\u0633\u0637 ISP \u06cc\u0627 \u0641\u0627\u06cc\u0631\u0648\u0627\u0644<\/li>\n\n\n\n<li>\u067e\u0631 \u0634\u062f\u0646 \u0641\u0636\u0627\u06cc \u062f\u06cc\u0633\u06a9 \u0633\u0631\u0648\u0631 \u0627\u06cc\u0645\u06cc\u0644<\/li>\n<\/ol>\n\n\n\n<div id=\"smtp-client-side-solutions\"><\/div><h3 id=\"gspb_heading-id-gsbp-c37a104\" class=\"gspb_heading gspb_heading-id-gsbp-c37a104 \">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 (Client)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0628\u0631\u0631\u0633\u06cc \u062a\u0646\u0638\u06cc\u0645\u0627\u062a SMTP \u062f\u0631 \u0646\u0631\u0645\u200c\u0627\u0641\u0632\u0627\u0631\u0647\u0627\u06cc\u06cc \u0645\u062b\u0644 Outlook \u06cc\u0627 Thunderbird.<\/li>\n\n\n\n<li>\u062a\u063a\u06cc\u06cc\u0631 \u067e\u0648\u0631\u062a SMTP \u0628\u0647 587 \u06cc\u0627 465 \u062f\u0631 \u0635\u0648\u0631\u062a \u0628\u0644\u0627\u06a9 \u0628\u0648\u062f\u0646 25.<\/li>\n\n\n\n<li>\u063a\u06cc\u0631 \u0641\u0639\u0627\u0644 \u06a9\u0631\u062f\u0646 \u0645\u0648\u0642\u062a \u0622\u0646\u062a\u06cc\u200c\u0648\u06cc\u0631\u0648\u0633 \u06cc\u0627 VPN.<\/li>\n<\/ul>\n\n\n\n<div id=\"smtp-server-side-solutions\"><\/div><h3 id=\"gspb_heading-id-gsbp-eb3c69f\" class=\"gspb_heading gspb_heading-id-gsbp-eb3c69f \">\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0633\u0645\u062a \u0645\u062f\u06cc\u0631 (Server)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af\u200c\u0647\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644 \u062f\u0631 \u0633\u0631\u0648\u0631 (\u0645\u0627\u0646\u0646\u062f Exim logs).<\/li>\n\n\n\n<li>\u0627\u0641\u0632\u0627\u06cc\u0634 \u0645\u0646\u0627\u0628\u0639 \u0633\u0631\u0648\u0631 \u062f\u0631 \u0635\u0648\u0631\u062a \u06a9\u0645\u0628\u0648\u062f CPU\/RAM.<\/li>\n\n\n\n<li>\u0628\u0631\u0631\u0633\u06cc Queue \u0627\u06cc\u0645\u06cc\u0644\u200c\u0647\u0627 \u0648 \u062d\u0630\u0641 \u067e\u06cc\u0627\u0645\u200c\u0647\u0627\u06cc \u0645\u0639\u0644\u0642.<\/li>\n\n\n\n<li>\u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u062f\u0627\u0645\u0646\u0647 \u062f\u0631 \u0644\u06cc\u0633\u062a \u0627\u0633\u067e\u0645 \u0633\u0631\u0648\u0631\u0647\u0627\u06cc \u062e\u0627\u0631\u062c\u06cc \u0642\u0631\u0627\u0631 \u0646\u06af\u0631\u0641\u062a\u0647 \u0628\u0627\u0634\u062f.<\/li>\n<\/ul>\n\n\n\n<p>\u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af\u200c\u0647\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644 \u062f\u0631 \u0633\u0631\u0648\u0631 (\u0645\u0627\u0646\u0646\u062f <strong>Exim logs<\/strong>) \u0627\u0632 \u0637\u0631\u06cc\u0642 \u062f\u0633\u062a\u0648\u0631\u0627\u062a \u0644\u06cc\u0646\u0648\u06a9\u0633\u06cc \u0632\u06cc\u0631 \u0627\u0646\u062c\u0627\u0645 \u067e\u0630\u06cc\u0631 \u0627\u0633\u062a \u062a\u0627 \u0639\u0644\u062a \u062e\u0637\u0627\u06cc 421 \u0645\u0634\u062e\u0635 \u0634\u0648\u062f.<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro padding-bottom-disabled cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#f6f6f4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#282A36\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#282A36;display:none;background-color:#f6f6f4\" aria-label=\"Copy\" data-copied-text=\"Copied!\" data-has-text-button=\"textSimple\" data-inside-header-type=\"headlights\" aria-live=\"polite\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>grep 421 \/var\/log\/exim_mainlog<\/textarea><\/pre><span class=\"cbp-btn-text\">Copy<\/span><\/span><pre class=\"shiki dracula-soft\" style=\"background-color: #282A36\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #62E884\">grep<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #BF9EEE\">421<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #E7EE98\">\/var\/log\/exim_mainlog<\/span><\/span><\/code><\/pre><span style=\"display:flex;align-items:flex-end;padding:10px;width:100%;justify-content:flex-start;background-color:#282A36;color:#ebebe6;font-size:12px;line-height:1;position:relative\"> <\/span><\/div>\n\n\n\n<div id=\"gspb_text-id-gsbp-0ca2cfd\" class=\"gspb_text gspb_text-id-gsbp-0ca2cfd \">\u06cc\u0627:<\/div>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro padding-bottom-disabled cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#f6f6f4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#282A36\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#282A36;display:none;background-color:#f6f6f4\" aria-label=\"Copy\" data-copied-text=\"Copied!\" data-has-text-button=\"textSimple\" data-inside-header-type=\"headlights\" aria-live=\"polite\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>tail -f \/var\/log\/exim_mainlog<\/textarea><\/pre><span class=\"cbp-btn-text\">Copy<\/span><\/span><pre class=\"shiki dracula-soft\" style=\"background-color: #282A36\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #62E884\">tail<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #BF9EEE\">-f<\/span><span style=\"color: #F6F6F4\"> <\/span><span style=\"color: #E7EE98\">\/var\/log\/exim_mainlog<\/span><\/span><\/code><\/pre><span style=\"display:flex;align-items:flex-end;padding:10px;width:100%;justify-content:flex-start;background-color:#282A36;color:#ebebe6;font-size:12px;line-height:1;position:relative\"> <\/span><\/div>\n\n\n\n<div id=\"prevent-error-421-future\"><\/div><h2 id=\"gspb_heading-id-gsbp-c8e0a01\" class=\"gspb_heading gspb_heading-id-gsbp-c8e0a01 \">\u0627\u0642\u062f\u0627\u0645\u0627\u062a \u067e\u06cc\u0634\u06af\u06cc\u0631\u0627\u0646\u0647 \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u062e\u0637\u0627\u06cc 421<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0645\u0627\u0646\u06cc\u062a\u0648\u0631\u06cc\u0646\u06af \u0633\u0631\u0648\u0631 \u0628\u0631\u0627\u06cc \u0628\u0631\u0631\u0633\u06cc \u0628\u0627\u0631 \u0644\u062d\u0638\u0647\u200c\u0627\u06cc<\/li>\n\n\n\n<li>\u0641\u0639\u0627\u0644\u200c\u0633\u0627\u0632\u06cc CSF Firewall \u0648 \u0627\u0636\u0627\u0641\u0647 \u06a9\u0631\u062f\u0646 IP \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0628\u0647 whitelist<\/li>\n\n\n\n<li>\u0645\u062d\u062f\u0648\u062f \u06a9\u0631\u062f\u0646 \u062a\u0639\u062f\u0627\u062f \u06a9\u0627\u0646\u06a9\u0634\u0646\u200c\u0647\u0627 \u062f\u0631 \u0633\u0637\u062d \u06a9\u0644\u0627\u06cc\u0646\u062a \u0648 \u0633\u0631\u0648\u0631<\/li>\n\n\n\n<li>\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0647\u0627\u0633\u062a\u06cc\u0646\u06af \u0645\u0639\u062a\u0628\u0631 \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 Server Overload<\/li>\n<\/ul>\n\n\n\n<div id=\"real-world-example-error-421\"><\/div><h3 id=\"gspb_heading-id-gsbp-b9c016b\" class=\"gspb_heading gspb_heading-id-gsbp-b9c016b \">\u0645\u062b\u0627\u0644 \u0648\u0627\u0642\u0639\u06cc \u0627\u0632 \u062f\u0631\u06cc\u0627\u0641\u062a \u062e\u0637\u0627 421: Unexpected failure<\/h3>\n\n\n\n<div id=\"gspb_text-id-gsbp-2aa9913\" class=\"gspb_text gspb_text-id-gsbp-2aa9913 \">\u0641\u0631\u0636 \u06a9\u0646\u06cc\u062f \u062f\u0631 \u062d\u06cc\u0646 \u0622\u067e\u0644\u0648\u062f \u0641\u0627\u06cc\u0644\u200c\u0647\u0627\u06cc \u0633\u0627\u06cc\u062a \u0628\u0627 FileZilla \u0628\u0627 \u062e\u0637\u0627\u06cc 421 Too many connections \u0645\u0648\u0627\u062c\u0647 \u0645\u06cc\u200c\u0634\u0648\u06cc\u062f. \u0628\u0627 \u0631\u0641\u062a\u0646 \u0628\u0647 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0648 \u06a9\u0627\u0647\u0634 \u062a\u0639\u062f\u0627\u062f \u06a9\u0627\u0646\u06a9\u0634\u0646\u200c\u0647\u0627\u06cc \u0647\u0645\u0632\u0645\u0627\u0646 \u0627\u0632 10 \u0628\u0647 2\u060c \u0645\u0634\u06a9\u0644 \u0628\u0631\u0637\u0631\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f. \u06cc\u0627 \u062f\u0631 \u062d\u0627\u0644 \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644\u200c\u0647\u0627\u06cc \u0627\u0646\u0628\u0648\u0647 \u062f\u0631 Outlook \u0647\u0633\u062a\u06cc\u062f \u0648 \u067e\u06cc\u0627\u0645 421 Unexpected failure \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u06cc\u200c\u06a9\u0646\u06cc\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u062d\u0627\u0644\u062a \u0628\u0631\u0631\u0633\u06cc \u067e\u0648\u0631\u062a SMTP \u0648 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0633\u0631\u0648\u0631 \u0627\u06cc\u0645\u06cc\u0644 \u0631\u0627\u0647\u200c\u062d\u0644 \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f.<\/div>\n\n\n\n<div id=\"conclusion-error-421-unexpected-failure\"><\/div><h3 id=\"gspb_heading-id-gsbp-7600d24\" class=\"gspb_heading gspb_heading-id-gsbp-7600d24 \">\u0646\u062a\u06cc\u062c\u0647\u200c\u06af\u06cc\u0631\u06cc:\u200c \u062e\u0637\u0627 Server replied: 421 Unexpected failure, please try later<\/h3>\n\n\n\n<div id=\"gspb_text-id-gsbp-ad4b893\" class=\"gspb_text gspb_text-id-gsbp-ad4b893 \">\u062e\u0637\u0627\u06cc 421 Unexpected failure \u06cc\u06a9 \u062e\u0637\u0627\u06cc \u0631\u0627\u06cc\u062c \u0627\u0645\u0627 \u0645\u0648\u0642\u062a \u062f\u0631 \u0633\u0631\u0648\u0631\u0647\u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u062f\u0631 \u0633\u0631\u0648\u06cc\u0633\u200c\u0647\u0627\u06cc FTP \u0648 SMTP \u0631\u062e \u062f\u0647\u062f. \u06a9\u0627\u0631\u0628\u0631\u0627\u0646 \u0628\u0627\u06cc\u062f \u0628\u062f\u0627\u0646\u0646\u062f \u0627\u06cc\u0646 \u062e\u0637\u0627 \u0628\u06cc\u0634\u062a\u0631 \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0627\u062a\u0635\u0627\u0644\u060c \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0627\u0634\u062a\u0628\u0627\u0647 \u0648 \u0628\u0627\u0631 \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f \u0633\u0631\u0648\u0631 \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f. \u0628\u0627 \u062f\u0646\u0628\u0627\u0644 \u06a9\u0631\u062f\u0646 \u0645\u0631\u0627\u062d\u0644 \u0639\u06cc\u0628\u200c\u06cc\u0627\u0628\u06cc \u0633\u0645\u062a \u06a9\u0644\u0627\u06cc\u0646\u062a \u0648 \u0645\u062f\u06cc\u0631 \u0633\u0631\u0648\u0631\u060c \u0628\u0647\u200c\u0631\u0627\u062d\u062a\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0645\u0634\u06a9\u0644 \u0631\u0627 \u0628\u0631\u0637\u0631\u0641 \u06a9\u0631\u062f. \u0627\u06af\u0631 \u062a\u0645\u0627\u0645\u06cc \u0631\u0648\u0634\u200c\u0647\u0627 \u0628\u06cc\u200c\u0646\u062a\u06cc\u062c\u0647 \u0628\u0648\u062f\u060c \u0627\u0631\u062a\u0628\u0627\u0637 \u0628\u0627 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0647\u0627\u0633\u062a \u0628\u0647\u062a\u0631\u06cc\u0646 \u0631\u0627\u0647 \u0627\u0633\u062a \u062a\u0627 \u067e\u0627\u06cc\u062f\u0627\u0631\u06cc \u0627\u0631\u062a\u0628\u0627\u0637\u0627\u062a \u062d\u06cc\u0627\u062a\u06cc \u0645\u0627\u0646\u0646\u062f \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0648 \u0627\u0646\u062a\u0642\u0627\u0644 \u0641\u0627\u06cc\u0644 \u062a\u0636\u0645\u06cc\u0646 \u0634\u0648\u062f.<\/div>\n\n\n\n<div id=\"faq-error-421\"><\/div><h3 id=\"gspb_heading-id-gsbp-a1576af\" class=\"gspb_heading gspb_heading-id-gsbp-a1576af \">\u0633\u0648\u0627\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644 \u0627\u0632 \u0631\u0641\u0639 \u062e\u0637\u0627 421<\/h3>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordion gs-accordion gspb_accordion-id-gsbp-1c83e2f togglelogic\" id=\"gspb_accordion-id-gsbp-1c83e2f\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\">\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-38d760d gsopen\" id=\"gspb_accordionitem-gsbp-38d760d\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-0\" class=\"gs-accordion-item__title\" aria-expanded=\"true\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-38d760d\"><h4 class=\"gs-accordion-item__heading\">1- \u062e\u0637\u0627 421 \u062f\u0631 Outlook \u0686\u06cc\u0633\u062a\u061f<\/h4><meta itemprop=\"name\" content=\"1- \u062e\u0637\u0627 421 \u062f\u0631 Outlook \u0686\u06cc\u0633\u062a\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-0\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-38d760d\" aria-hidden=\"false\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u0627\u06cc\u0646 \u062e\u0637\u0627 \u0628\u0647 \u0645\u0639\u0646\u0627\u06cc \u0639\u062f\u0645 \u062a\u0648\u0627\u0646\u0627\u06cc\u06cc \u0645\u0648\u0642\u062a \u0633\u0631\u0648\u0631 \u0627\u06cc\u0645\u06cc\u0644 \u062f\u0631 \u067e\u0631\u062f\u0627\u0632\u0634 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0634\u0645\u0627\u0633\u062a. \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0627\u0631\u0633\u0627\u0644 \u06cc\u0627 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0627\u0634\u062a\u0628\u0627\u0647 SMTP \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-7ff5ada gsclose\" id=\"gspb_accordionitem-gsbp-7ff5ada\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-1\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-7ff5ada\"><h4 class=\"gs-accordion-item__heading\">2-  \u0622\u06cc\u0627 \u062e\u0637\u0627\u06cc 421 \u062f\u0627\u0626\u0645\u06cc \u0627\u0633\u062a\u061f<\/h4><meta itemprop=\"name\" content=\"2-  \u0622\u06cc\u0627 \u062e\u0637\u0627\u06cc 421 \u062f\u0627\u0626\u0645\u06cc \u0627\u0633\u062a\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-1\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-7ff5ada\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u062e\u06cc\u0631. \u0627\u06cc\u0646 \u062e\u0637\u0627 \u0645\u0648\u0642\u062a \u0627\u0633\u062a \u0648 \u0627\u063a\u0644\u0628 \u0628\u0627 \u06a9\u0627\u0647\u0634 \u0628\u0627\u0631 \u06cc\u0627 \u0627\u0635\u0644\u0627\u062d \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0628\u0631\u0637\u0631\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-ae64f67 gsclose\" id=\"gspb_accordionitem-gsbp-ae64f67\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-2\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-ae64f67\"><h4 class=\"gs-accordion-item__heading\">3- \u0686\u0647 \u0632\u0645\u0627\u0646\u06cc \u062f\u0631 \u062e\u0635\u0648\u0635 \u062d\u0637\u0627 421  \u0628\u0627\u06cc\u062f \u0628\u0627 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0647\u0627\u0633\u062a \u062a\u0645\u0627\u0633 \u06af\u0631\u0641\u062a\u061f<\/h4><meta itemprop=\"name\" content=\"3- \u0686\u0647 \u0632\u0645\u0627\u0646\u06cc \u062f\u0631 \u062e\u0635\u0648\u0635 \u062d\u0637\u0627 421  \u0628\u0627\u06cc\u062f \u0628\u0627 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0647\u0627\u0633\u062a \u062a\u0645\u0627\u0633 \u06af\u0631\u0641\u062a\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-2\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-ae64f67\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u0627\u06af\u0631 \u062a\u0645\u0627\u0645\u06cc \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u06a9\u0644\u0627\u06cc\u0646\u062a \u0648 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u067e\u06cc\u0634\u0646\u0647\u0627\u062f\u06cc \u0631\u0627 \u062a\u0633\u062a \u06a9\u0631\u062f\u06cc\u062f \u0648 \u0647\u0645\u0686\u0646\u0627\u0646 \u062e\u0637\u0627 \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u060c \u0645\u0634\u06a9\u0644 \u0633\u0645\u062a \u0633\u0631\u0648\u0631 \u0627\u0633\u062a \u0648 \u0628\u0627\u06cc\u062f \u0628\u0627 \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-1f0a59b gsclose\" id=\"gspb_accordionitem-gsbp-1f0a59b\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-3\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-1f0a59b\"><h4 class=\"gs-accordion-item__heading\">4- Server replied 421 \u0686\u0647 \u062a\u0641\u0627\u0648\u062a\u06cc \u062f\u0631 FTP \u0648 SMTP \u062f\u0627\u0631\u062f\u061f<\/h4><meta itemprop=\"name\" content=\"4- Server replied 421 \u0686\u0647 \u062a\u0641\u0627\u0648\u062a\u06cc \u062f\u0631 FTP \u0648 SMTP \u062f\u0627\u0631\u062f\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-3\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-1f0a59b\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u062f\u0631 FTP \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0628\u0647 \u062f\u0644\u06cc\u0644 Too Many Connections \u0631\u062e \u0645\u06cc\u200c\u062f\u0647\u062f\u060c \u0627\u0645\u0627 \u062f\u0631 SMTP \u0628\u06cc\u0634\u062a\u0631 \u0628\u0647 \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0648 \u0645\u0634\u06a9\u0644\u0627\u062a \u0627\u0645\u0646\u06cc\u062a\u06cc \u0645\u0631\u0628\u0648\u0637 \u0627\u0633\u062a.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-1fc5824 gsclose\" id=\"gspb_accordionitem-gsbp-1fc5824\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-4\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-1fc5824\"><h4 class=\"gs-accordion-item__heading\">5- \u0686\u06af\u0648\u0646\u0647 \u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af \u0633\u0631\u0648\u0631 421 \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc\u200c\u0634\u0648\u062f\u061f<\/h4><meta itemprop=\"name\" content=\"5- \u0686\u06af\u0648\u0646\u0647 \u0628\u0631\u0631\u0633\u06cc \u0644\u0627\u06af \u0633\u0631\u0648\u0631 421 \u0627\u0646\u062c\u0627\u0645 \u0645\u06cc\u200c\u0634\u0648\u062f\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-4\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-1fc5824\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u0645\u062f\u06cc\u0631 \u0633\u0631\u0648\u0631 \u0628\u0627\u06cc\u062f \u0628\u0647 \u0641\u0627\u06cc\u0644\u200c\u0647\u0627\u06cc \u0644\u0627\u06af \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0633\u0631\u0648\u06cc\u0633 (\u0645\u0627\u0646\u0646\u062f <strong>\/var\/log\/exim_mainlog<\/strong> \u06cc\u0627 <strong>pure-ftpd.log<\/strong>) \u0645\u0631\u0627\u062c\u0639\u0647 \u06a9\u0646\u062f.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-575a0a1 gsclose\" id=\"gspb_accordionitem-gsbp-575a0a1\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-5\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-575a0a1\"><h4 class=\"gs-accordion-item__heading\">6- \u0622\u06cc\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Passive Mode \u062f\u0631 FTP \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a\u061f<\/h4><meta itemprop=\"name\" content=\"6- \u0622\u06cc\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Passive Mode \u062f\u0631 FTP \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-5\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-575a0a1\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u0628\u0644\u0647\u060c \u0628\u0631\u0627\u06cc \u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0645\u0634\u06a9\u0644\u0627\u062a \u0641\u0627\u06cc\u0631\u0648\u0627\u0644 \u0648 NAT \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 Passive Mode FTP \u062a\u0648\u0635\u06cc\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greenshift-blocks-accordionitem gs-accordion-item gspb_accordionitem-gsbp-03c8b06 gsclose\" id=\"gspb_accordionitem-gsbp-03c8b06\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"><div id=\"gs-trigger-gsbp-1c83e2f-6\" class=\"gs-accordion-item__title\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\" aria-controls=\"gspb-accordion-item-content-gsbp-03c8b06\"><h4 class=\"gs-accordion-item__heading\">7- \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0686\u06cc\u0633\u062a\u061f<\/h4><meta itemprop=\"name\" content=\"7- \u0645\u062d\u062f\u0648\u062f\u06cc\u062a \u0646\u0631\u062e \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u0686\u06cc\u0633\u062a\u061f\"\/><span class=\"iconfortoggle\"><span class=\"gs-iconbefore\"><\/span><span class=\"gs-iconafter\"><\/span><\/span><\/div><div aria-labelledby=\"gs-trigger-gsbp-1c83e2f-6\" class=\"gs-accordion-item__content\" itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\" id=\"gspb-accordion-item-content-gsbp-03c8b06\" aria-hidden=\"true\"><div class=\"gs-accordion-item__text\" itemprop=\"text\">\n<p>\u0633\u0631\u0648\u06cc\u0633\u200c\u062f\u0647\u0646\u062f\u0647\u200c\u0647\u0627\u06cc \u0627\u06cc\u0645\u06cc\u0644 \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u0633\u0642\u0641\u06cc \u0628\u0631\u0627\u06cc \u0627\u0631\u0633\u0627\u0644 \u0627\u06cc\u0645\u06cc\u0644 \u062f\u0631 \u0647\u0631 \u0633\u0627\u0639\u062a \u062a\u0639\u06cc\u06cc\u0646 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f. \u0639\u0628\u0648\u0631 \u0627\u0632 \u0627\u06cc\u0646 \u062d\u062f \u0628\u0627\u0639\u062b \u0628\u0631\u0648\u0632 \u062e\u0637\u0627\u06cc 421 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n<\/div><\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0622\u0645\u0648\u0632\u0634 \u06a9\u0627\u0645\u0644 \u0648 \u06a9\u0627\u0631\u0628\u0631\u062f\u06cc \u0631\u0641\u0639 \u062e\u0637\u0627 421 Unexpected failure \u062f\u0631 FTP \u0648 SMTP \u0628\u0647 \u0647\u0645\u0631\u0627\u0647 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0639\u06cc\u0628\u200c\u06cc\u0627\u0628\u06cc \u0633\u0645\u062a \u06a9\u0627\u0631\u0628\u0631 \u0648 \u0645\u062f\u06cc\u0631 \u0633\u0631\u0648\u0631 \u0645\u0648\u0636\u0648\u0639\u06cc \u0627\u0633\u062a \u06a9\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0642\u0627\u0644\u0647 \u0628\u0647 \u0635\u0648\u0631\u062a \u062c\u0627\u0645\u0639 \u0628\u0647 \u0639\u0644\u0644 \u062f\u0631\u06cc\u0627\u0641\u062a \u062e\u0637\u0627 421 \u067e\u0631\u062f\u0627\u062e\u062a\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/p>\n","protected":false},"author":2,"featured_media":20044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":".gspb_text-id-gsbp-6fe7ab9{margin-top:30px!important;margin-bottom:44px!important}.gspb_container-id-gsbp-ece0ea6{flex-direction:column;box-sizing:border-box}#gspb_container-id-gsbp-3090342.gspb_container>p:last-of-type,#gspb_container-id-gsbp-829a48d.gspb_container>p:last-of-type,#gspb_container-id-gsbp-ece0ea6.gspb_container>p:last-of-type{margin-bottom:0}#gspb_container-id-gsbp-ece0ea6.gspb_container{position:relative;padding:25px}@media 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