Sorry to pester again, but I've changed to using lmtp and now I'm seeing these messages... Apr 24 15:22:07 www postfix/lmtp[20805]: 8A47473544: to=<[EMAIL PROTECTED]>, relay=/var/imap/socket/lmtp[/var/imap/socket/lmtp], delay=1425, status=deferred (host /var/imap/socket/lmtp[/var/imap/socket/lmtp] said: 452 4.2.2 Over quota) Apr 24 15:22:07 www postfix/lmtp[20813]: E602273735: to=<[EMAIL PROTECTED]>, relay=/var/imap/socket/lmtp[/var/imap/socket/lmtp], delay=7857, status=deferred (host /var/imap/socket/lmtp[/var/imap/socket/lmtp] said: 452 4.2.2 Over quota) Apr 24 15:22:07 www postfix/lmtp[20810]: 7F0E073539: to=<[EMAIL PROTECTED]>, relay=/var/imap/socket/lmtp[/var/imap/socket/lmtp], delay=48123, status=deferred (host /var/imap/socket/lmtp[/var/imap/socket/lmtp] said: 452 4.2.2 Over quota) Apr 24 15:22:07 www postfix/lmtp[20805]: 0B9C673733: to=<[EMAIL PROTECTED]>, relay=/var/imap/socket/lmtp[/var/imap/socket/lmtp], delay=8406, status=deferred (host /var/imap/socket/lmtp[/var/imap/socket/lmtp] said: 452 4.2.2 Over quota) Now this is strange as I've not set any quota for my users (or at least didn't think I had) so any ideas where the problem is? I should point out that about a second later I get succesful sends of mail, so I'm confused. Thanks. david