Kunnskapsbase

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You may have moved from cPanel to DirectAdmin and noticed that the subdomain "webmail" is not available for users to send them directly to webmail on each of their domains. However, you can add this functionality to DirectAdmin so that you can add a "webmail" subdomain to any domain's DNS on the system, and then use it to route the user to the server's webmail client.

Open/Create this file:
/usr/local/directadmin/data/templates/custom/virtual_host2.conf.CUSTOM.4.post

Add this to it's contents:

</VirtualHost>
<VirtualHost |IP|:|PORT_80| |MULTI_IP|>
   ServerName webmail.|DOMAIN|
   ServerAdmin |ADMIN|
   DocumentRoot /var/www/html/roundcube
   CustomLog /var/log/httpd/domains/|DOMAIN|.bytes bytes
   CustomLog /var/log/httpd/domains/|DOMAIN|.log combined
   ErrorLog /var/log/httpd/domains/|DOMAIN|.error.log
   <IfModule !mod_ruid2.c>
       SuexecUserGroup webapps webapps
   </IfModule>

Save and close the file.

Next, open/create this file:
/usr/local/directadmin/data/templates/custom/virtual_host2_secure.conf.CUSTOM.4.post

Add this to the file:

</VirtualHost>
<VirtualHost |IP|:|PORT_443| |MULTI_IP|>
   ServerName webmail.|DOMAIN|
   ServerAdmin |ADMIN|
   DocumentRoot /var/www/html/roundcube

   SSLEngine on
   SSLCertificateFile |CERT|
   SSLCertificateKeyFile |KEY|
   |CAROOT|

   CustomLog /var/log/httpd/domains/|DOMAIN|.bytes bytes
   CustomLog /var/log/httpd/domains/|DOMAIN|.log combined
   ErrorLog /var/log/httpd/domains/|DOMAIN|.error.log
   <IfModule !mod_ruid2.c>
       SuexecUserGroup webapps webapps
   </IfModule>

Save the file. Now every new domain added to the system will be ready for this. Simply add "webmail" as a subdomain to the domain's DNS, have it point to the DirectAdmin server, and you're done.