IMAP folders not working

[titanium]

I have an Xserve running 10.3.9 (without the March update), which is behaving a little strangely.

All users were set up as IMAP mail accounts which was fine until the DB seemed to corrupt itself last night. I rebuilt the db using Apple’s guidlines, and now the clients cannot see there mail using their email client. But if you log in using squirrel mail it works just fine, you can send,receive etc.
As a temporary measure i have changed all users to be able to use POP accounts, and these are working OK.
I also tried to set up some of the users on a new machine just to check it wasnt a local problem, and this hasnt helped.

Any suggestions??

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