Right, no entries in the logfile is a bit strangely and not really helpfull! What could I do to activate the /var/log/zimbra.log? If I understand it right, this is the place where the MTA will write its output.
The errormessage from my relayserver in the internet is very simple:
Oh, and I ve an other information from the mailer-deamon on my zimbra-server, who send an email to my zimbra account:
/var/qmail/bin/relaylock: /var/qmail/bin/relaylock: mail from 18.104.22.168:34003
maybe this is a little hint ...
<email@example.com>: host my.relay-server.com[22.214.171.124] said: 553 sorry, that domain
isn't in my list of allowed rcpthosts; no valid cert for gatewaying (#5.7.1) (in
reply to RCPT TO command)