Originally Posted by mentes
Well, I don't know what is a "zombie process", but I imagine is not good a thing.
I had not touched /etc/MailScanner/MailScanner.conf before. What can I check there?
Zombies are dead processes that can't be released. (man ps)
You should double check your log files, there must be something in it that could give you a lead on what's going on ..
Else remove Mailscanner from your mail setup and see if it works.
did you try postsuper -H ALL ?
Why are you using mailscanner btw?
If your new to all this, you might want to use one of the "Perfect How-to's from this site to get your ispconfig system up and running.