{"id":2857,"date":"2015-08-24T09:34:00","date_gmt":"2015-08-24T09:34:00","guid":{"rendered":"https:\/\/cpanelplesk.com\/wp62\/?p=2857"},"modified":"2021-02-18T05:49:30","modified_gmt":"2021-02-18T05:49:30","slug":"how-to-install-postfix-on-centosrhel","status":"publish","type":"post","link":"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/","title":{"rendered":"How to Install Postfix on CentOS\/RHEL"},"content":{"rendered":"<p><span style=\"color: #000000;\">Postfix is free open source mail transfer agent. The primary job of postfix is to pass on email locally or to intended location outside the system. Some of the most well-known<\/span> <a href=\"https:\/\/cpanelplesk.com\/wp62\/smtp-error-1-connection-to-server-failed\/\">SMTP<\/a> <span style=\"color: #000000;\">web servers are Sendmail, Postfix and Qmail. By standard Sendmail comes pre-installed with CentOS\/RHEL 5. We will need to remove it and set up Postfix.<\/span><!--more--><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">yum remove sendmail\r\nyum install postfix<\/pre>\n<\/div>\n<p>U<span style=\"color: #000000;\">se following command to make<\/span> <a href=\"https:\/\/cpanelplesk.com\/wp62\/find-spamming-account-in-postfix-or-plesk\/\">postfix<\/a> <span style=\"color: #000000;\">as default MTA for your system:<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">alternatives --set mta \/usr\/sbin\/postfix<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">If you get output as\u00a0\u201c\/usr\/sbin\/postfix has not been configured as an alternative for mta\u201c. Use below command to do the same else skip it:<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">alternatives --set mta \/usr\/sbin\/sendmail.postfix<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Now we are going to configure the postfix ,\u00a0Edit Postfix configuration file <strong>\/etc\/postfix\/main.cf<\/strong>\u00a0 and make following changes:<\/span><\/p>\n<div class=\"cpanel-files\"><\/div>\n<pre class=\"lang:default decode:true\">myhostname = mail.cpanelplesk.com\r\nmydomain = cpanelplesk.com\r\nmyorigin = $mydomain\r\ninet_interfaces = all\r\nmydestination = $myhostname, localhost, $mydomain\r\nmynetworks = 127.0.0.0\/8, \/32\r\nrelay_domains = $mydestination\r\nhome_mailbox = Maildir\/<\/pre>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Restart Postfix service to read the changes of settings. Also set up to automatic start on system boot.<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">service postfix restart \r\nchkconfig postfix on<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Now add firewall rules to make postfix accessible from outside, using following commands:\u00a0<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT \r\niptables -A INPUT -m state --state NEW -m udp -p udp --dport 25 -j ACCEPT<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Congratulation , now you have postfix installed and you are all set to send email.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Postfix is free open source mail transfer agent. The primary job of postfix is to pass on email locally or to intended location outside the system. Some of the most well-known SMTP web servers are Sendmail, Postfix and Qmail. By standard Sendmail comes pre-installed with CentOS\/RHEL 5. We will need to remove it and set [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/\">Continue Reading&#8230;<\/a><\/p>\n","protected":false},"author":2,"featured_media":2864,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,14],"tags":[],"class_list":["post-2857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cpanel","category-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Install Postfix on CentOS\/RHEL - 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\/how-to-install-postfix-on-centosrhel\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"How to Install Postfix on CentOS\/RHEL - cPanel Plesk\" \/>\n<meta name=\"twitter:description\" content=\"Postfix is free open source mail transfer agent. The primary job of postfix is to pass on email locally or to intended location outside the system. Some of the most well-known SMTP web servers are Sendmail, Postfix and Qmail. By standard Sendmail comes pre-installed with CentOS\/RHEL 5. We will need to remove it and set [...]Continue Reading...\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/cpanelplesk.com\/wp62\/wp-content\/uploads\/2015\/08\/post-fix-e1440408809855.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Seemab Saleem\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/\"},\"author\":{\"name\":\"Seemab Saleem\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/#\/schema\/person\/73d573cc7eaaf6625cf0dbd72191a648\"},\"headline\":\"How to Install Postfix on CentOS\/RHEL\",\"datePublished\":\"2015-08-24T09:34:00+00:00\",\"dateModified\":\"2021-02-18T05:49:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/\"},\"wordCount\":171,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/#\/schema\/person\/c78ae1cf9451a09592fb9697d69c0c13\"},\"image\":{\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cpanelplesk.com\/wp62\/wp-content\/uploads\/2015\/08\/post-fix-e1440408809855.jpg\",\"articleSection\":[\"Cpanel\",\"Linux\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/\",\"url\":\"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/\",\"name\":\"How to Install Postfix on CentOS\/RHEL - 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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. Thanks!!\",\"sameAs\":[\"https:\/\/cpanelplesk.com\/wp62\"],\"url\":\"https:\/\/cpanelplesk.com\/wp62\/author\/cmb\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How to Install Postfix on CentOS\/RHEL - cPanel Plesk","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/cpanelplesk.com\/wp62\/how-to-install-postfix-on-centosrhel\/","twitter_card":"summary_large_image","twitter_title":"How to Install Postfix on CentOS\/RHEL - cPanel Plesk","twitter_description":"Postfix is free open source mail transfer agent. The primary job of postfix is to pass on email locally or to intended location outside the system. Some of the most well-known SMTP web servers are Sendmail, Postfix and Qmail. By standard Sendmail comes pre-installed with CentOS\/RHEL 5. 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