I gues we are on to something here.
The repquota command showed that the account that is having mailtroulble is over it's previous qouta of 50mb and is now using 53mb.
Currenlty the limit(that I raised it to) is 100mb.
Problem is that when i check the Maildir directory in the clients webspace, there are just a few mails of today.
When I do a "du -h new" command in there to check the size of the combined mails, it says it contains only 564k.
That is correct with what I am seeing.
So where is the other 53mb holding up?
I have the same with the other troubled accounts by the way.