I've checked the permissions on the maildir and it seems at the moment that the user has rw permssion on every file under cur, could this error be caused by an interaction between Postfix and Dovecot?
Any comments / suggestions greatly appreciated,
Dominic Marks
Mar 16 01:24:22 mail imap-login: Login: someuser [192.168.0.1] Mar 16 01:24:24 mail imap(someuser): open() failed with file /raid/mail/someuser/cur/1076979223.V416I136863.silverback.example.com:2,ST: Permission denied
I assume you've checked that "someuser" owns that file.
Also check that every directory in the path is accessable to that user in the proper way. If it's NFS-mounted, the underlying mount point may have to have the correct permissions too (i.e., unmount the volume and have a look). An easy check is just to su to the "someuser" user and see if you can access the file in question.
mm