Thank You for the replay!
I'm read troubleshooting steps, do you mean problems with certificate ?
Now I recreated Self-Signed SSL Certificate with:
And then restart zimbra
/opt/zimbra/bin/zmcertmgr createca -new
/opt/zimbra/bin/zmcertmgr createcrt -new -days 365
/opt/zimbra/bin/zmcertmgr deploycrt self
everything works as before. User accounts in order: firstname.lastname@example.org
but zimbra is trying to send mail with an incorrect address email@example.com -> firstname.lastname@example.org