PLESK Change webmail and mailserver URL

Question

Expect following PLESK Panel (12.5) with following domains:

maindomain.de (This is the hostname of the server)
customer1.de
customer2.de

The mail server is accessable via: mail.[domain].de The webmail is accessable via: webmail.[domain].de

Is it possible to configure plesk, that all (maindomain, customer1, customer2) can access the mailserver via: maindomain.de (for all customers) and the webmail is also accessable via maindomain.de, webmail.customer1.de and webmail.customer2.de?

Can this be establish with the DNS or how can it be solved?

Answer 1

You can change the subdomains used for mail / webmail in the standard DNS template which can be found in Tools & Settings > DNS Template
Change all directives that contain webmail to a subdomain you want and save your changes.

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All users should be able to access their mails from maindomain.de, at least this is working for me and I use a non-modified DNS template. As far as I know it is not possible to access the webmail client from the hostname domain (webmail.maindomain.de).