probleminha no acesso ao imbox.

Olá pessoal , estou tento esse probleminha no pop3 , estou usando o dovecot .

Nov 28 08:17:23 srv-net pop3-login: Login: teste [10.0.2.90]
Nov 28 08:17:23 srv-net pop3(teste): open(/var/mail/teste.lock) failed: Permission denied
Nov 28 08:17:23 srv-net pop3(teste): file_lock_dotlock() failed with mbox file /var/mail/teste: Permission denied
Nov 28 08:17:23 srv-net pop3(teste): open(/var/mail/teste.lock) failed: Permission denied
Nov 28 08:17:23 srv-net pop3(teste): file_lock_dotlock() failed with mbox file /var/mail/teste: Permission denied
Nov 28 08:17:23 srv-net pop3(teste): Couldn't open INBOX: Internal error occured. Refer to server log for more information. [2005-11-28 08:17:23]