Hi Marko
Create users in the form of:
dom1_webmaster -> webmaster@domain1.de
dom2_webmaster -> webmaster@domain2.de
dom3_webmaster -> webmaster@domain3.de
or (eg)
dom1_marko_dargel -> marko.dargel@domain1.de
dom2_marko_dargel -> marko.dargel@domain2.de
dom3_marko_dargel -> marko.dargel@domain3.de
The first part is the actual username, this can recieve mail, but as no one knows about it, it’s never used. This is basically just a username, for clients to log in…
The second part is the email alias (What is actually used for reception of mails.
Outgoing is set in the client. (Thunderbird, Mac Mail, Outlook, etc.)
If using Webmail like Roundcube, just set that for each user in roundcube. (Settings / Identity)
This should solve your mail / user account problems, or at least suggest a naming convention which works!
My 2 cents
Andy
PS: personally, i put the domain-identifier at the end: username_dom1…