I didn't find my error messages somewhere else in the forums, if there was a similar problem, I am sorry for this thread.
This morning I recognised that my Zimbra server wasn't running, so I tried a "zmcontrol status". It didn't work:
After a "zmcontrol start" the server was running.
Cannot determine services - exiting
I looked into zimbra.log and I am quite worried.
I attached a part of zimbra.log. How can I look into the zimbra.log of yesterday? The server has been crashed in the time after 8 PM, that was the time I received the last mail.