[Dovecot] problem setting up dovecot server

Hi all:

I have a problem running my dovecot server. I get the following error message when trying to get mail from my account with INBOX in /var/spool/mail/tanim (username tanim).

Nov 22 19:23:00 phobos imap(tanim): file_lock_dotlock() failed with mbox file /var/spool/mail/tanim: Permission denied

What permissions should I set for the mailbox? I am running dovecot-0.99.11-1.1.

Tanim

Astronomy 109, Department of Astronomy P. O. Box 3818, University of Virginia Charlottesville, VA 22903