How to add a new domain in iRedMail

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I have deployed a mail server using iRedMail. Now I want to add a new domain to this server.

How to add

Configuration on server

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vim /opt/www/roundcubemail/config/config.inc.php
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$config['username_domain'] = $config['default_host'] = array(
   '127.0.0.1' => 'a.com',
   '127.0.0.2' => 'b.com',
   '127.0.0.3' => 'c.com',
);
// The ip address can be whatever you like as long as it is in right format.
// 使用的ip如127.0.0.1 或 127.0.0.2， 只要ip格式正确，可以随便写
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vim /opt/www/roundcubemail/program/include/rcmail.php
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$host = '127.0.0.1';  // add host redirect
//$host = rcube_utils::idn_to_ascii($host);  //original code

Add new DNS to your new domain

You need to add a new MX record on DNS server which point to your mail server domain. It is recommended to add a rDNS(PTR record) for your domain, or you cannot send e-mail to gmail.

Add new domain on admin web page.

Log in https://mail.your.domain/iredadmin as admin, and add your new domain to your mail server. Also, do not forget to add a new user for using.

Reference

  1. https://yisangwu.github.io/iredmail/2019/07/21/iredmail-multi-domain.html