Now our server supports mailing lists.
For mailing lists the software Mailman is used.

Mailing lists: https://lists.dotnine.de/

Now we have quota for our email accounts (set able over mysql)
Also we support now maildrop MTA filtering over squirrel mail.
Therefore set in squirrel mail your filters and it will be filtered
for any email software (so called server filtering).

Next part done

SMTP is working now.
The problem was a missing pam_mysql library,
and that PAM was not using the MySQL socket for connections.

Work done

Email server in now installed.
You can login over a webmailer Squirrelmail

• Postfix
• amavis
• clamvs
• spamassassin
• squirrelmail
• IMAP/POP3
• TSL/SSL