{"id":1774,"date":"2016-09-16T02:16:12","date_gmt":"2016-09-16T08:16:12","guid":{"rendered":"http:\/\/www.supportpro.com\/blog\/?p=1774"},"modified":"2019-08-26T04:42:36","modified_gmt":"2019-08-26T10:42:36","slug":"smarthost-forwarding-mails-through-postfix-server-from-exim","status":"publish","type":"post","link":"https:\/\/www.supportpro.com\/blog\/smarthost-forwarding-mails-through-postfix-server-from-exim\/","title":{"rendered":"SmartHost :- Forwarding Mails Through Postfix Server (From Exim)"},"content":{"rendered":"

A \u201cSmart Host<\/strong>\u201d (also known as a relay host) is a type of mail relay server which allows an SMTP server to route e-mail to an intermediate mail server rather than directly to the recipient\u2019s server. This improves the performance of your server and the reliability of your e-mail delivery.<\/p>\n

Exim Server (Forwarding Server)<\/strong><\/span><\/p>\n

This server will be forwarding all emails to the SmartHost for relay for final delivery. If you are not using cPanel \/ WHM, then you will simply edit ‘\/etc\/exim.conf’ instead of using cPanel \/ WHM’s interface. However, if the server is running cPanel \/ WHM you must edit the configuration file through the GUI as cPanel \/ WHM will revert your changes automatically over time.
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\n>> Edit Exim Configuration and add “smart_route:” details below the section labeled “ROUTERSTART<\/strong>”<\/p>\n

>> Restart Exim Server<\/p>\n

After the above configuration is saved, the Exim service should automatically restart. However, if it doesn’t you may restart it via command line manually:<\/p>\n

\/scripts\/restartsrv_exim<\/em><\/p>\n

Or<\/p>\n

\/etc\/init.d\/exim restart<\/em><\/p>\n

Postfix Server (SmartHost)<\/strong><\/span><\/p>\n

Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail, intended as an alternative to the widely-used Sendmail MTA. Postfix is released under the IBM Public License 1.0 which is a free software license.<\/p>\n

>> Installation<\/p>\n

yum install postfix -y<\/em><\/p>\n

>> Configuration
\n\/etc\/postfix\/main.cf<\/em><\/p>\n

Ensure the following lines match:<\/p>\n

inet_interfaces = all
\nmynetworks = 127.0.0.0\/8, REMOTE_IP_HERE<\/p>\n

The inet_interfaces parameter specifies the network interface addresses that this mail system receives mail on and must be changed from “localhost” to “all”.<\/em><\/p>\n

Uncomment the parameter mynetworks and add Remote Server’s IP to give the permission to relay messages through this server.<\/em><\/p>\n

etc\/postfix\/master.cf<\/em><\/p>\n

Make sure the following line is not commented:<\/p>\n

submission\u00a0 inet\u00a0 n\u00a0 \u00a0–\u00a0 n\u00a0 –\u00a0 –\u00a0 \u00a0smtpd<\/em><\/p>\n

>> Start Postfix<\/p>\n

\/etc\/init.d\/postfix start
\nchkconfig postfix on<\/p>\n

Need expert assistance?<\/strong><\/p>\n

SupportPRO<\/a> has a team of well-experienced professionals and we can assist you with the SmartHost setup. Feel free to contact us if you need assistance.<\/p>\n

If you require help, contact SupportPRO Server Admin<\/a><\/p>\n

\"Server<\/a><\/span>