{"id":2471,"date":"2015-07-24T07:12:23","date_gmt":"2015-07-24T07:12:23","guid":{"rendered":"https:\/\/cpanelplesk.com\/wp62\/?p=2471"},"modified":"2021-02-09T06:05:16","modified_gmt":"2021-02-09T06:05:16","slug":"smtp-error-1-connection-to-server-failed","status":"publish","type":"post","link":"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/","title":{"rendered":"SMTP Error (-1): Connection to server failed"},"content":{"rendered":"<p>One of our client was getting error\u00a0when\u00a0attempting to send email from Mail client:<\/p>\n<p>[wpfmb type=&#8217;error&#8217; theme=2]SMTP Error (-1): Connection to server failed[\/wpfmb]<\/p>\n<p>This error is generally happen due to a setting in the <a href=\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-csf-firewall-on-cpanel-server\/\">CSF firewall<\/a> program or another firewall. It might be due to having the following set:<\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">SMTP_BLOCK = 1\r\nSMTP_ALLOWLOCAL = 0<\/pre>\n<p>M<\/p><\/div>\n<p>You just need to modify\u00a0<strong>SMTP_ALLOWLOCAL to 1<\/strong> to enable webmail to function.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of our client was getting error\u00a0when\u00a0attempting to send email from Mail client: [wpfmb type=&#8217;error&#8217; theme=2]SMTP Error (-1): Connection to server failed[\/wpfmb] This error is generally happen due to a setting in the CSF firewall program or another firewall. It might be due to having the following set: SMTP_BLOCK = 1 SMTP_ALLOWLOCAL = 0 M [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\">Continue Reading&#8230;<\/a><\/p>\n","protected":false},"author":2,"featured_media":2146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cpanel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SMTP Error (-1): Connection to server failed - cPanel Plesk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"SMTP Error (-1): Connection to server failed - cPanel Plesk\" \/>\n<meta name=\"twitter:description\" content=\"One of our client was getting error\u00a0when\u00a0attempting to send email from Mail client: [wpfmb type=&#8217;error&#8217; theme=2]SMTP Error (-1): Connection to server failed[\/wpfmb] This error is generally happen due to a setting in the CSF firewall program or another firewall. It might be due to having the following set: SMTP_BLOCK = 1 SMTP_ALLOWLOCAL = 0 M [...]Continue Reading...\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/cpanelplesk.com\/wp62\/wp-content\/uploads\/2015\/06\/firewall.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Seemab Saleem\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\"},\"author\":{\"name\":\"Seemab Saleem\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/#\/schema\/person\/73d573cc7eaaf6625cf0dbd72191a648\"},\"headline\":\"SMTP Error (-1): Connection to server failed\",\"datePublished\":\"2015-07-24T07:12:23+00:00\",\"dateModified\":\"2021-02-09T06:05:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\"},\"wordCount\":74,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/#\/schema\/person\/c78ae1cf9451a09592fb9697d69c0c13\"},\"image\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cpanelplesk.com\/wp62\/wp-content\/uploads\/2015\/06\/firewall.jpg\",\"articleSection\":[\"Cpanel\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\",\"url\":\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\",\"name\":\"SMTP Error (-1): Connection to server failed - 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I'm dealing with Linux servers since 2014. I started this blog to share the work i love with the world . let me know if you need any assistance. 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