 zimbra.log errors?
I'd bet that when postfix tries to deliver those messages, you're getting errors in zimbra.log. If you can paste those errors into a posting, it'd really help us figure out what's wrong.
It's not a permissions problem (zmfixperms solves this) or an old kernel (yum update kernel has been said to work on the appropriate OS), right?
And please make sure those accounts aren't over quota! |