[Dovecot] ERROR : Connection dropped by imap-server.

[Paul Matthews]

hi there,

i'm trying to setup dovecot with squirrel mail at the moment and i'm getting
this error message

ERROR:
ERROR : Could not complete request.
Query: CREATE "Sent"
Reason Given: Permission denied

ERROR:
ERROR : Connection dropped by imap-server.
Query: SELECT "INBOX"

can someone tell me what this means? and what folders i have to change the
permissions on?

this is out of my /etc/dovecot.conf file if it helps

default_mail_env = mbox:/var/mail/%u:mbox:~/mail/