Permissions on /var/log/dovecot

[@lbutlr]

/var/log/dovecot exists and has a lot of logging in it, but I get errors (in mail.log) on an always_bcc action in postfix:

mail postfix/pipe[13015]: 401cvS0R8BzbSkL: to=<backup+073.kremels-kreme at doamin.tld>, relay=dovecot, delay=398058, delays=398045/13/0/0.04, dsn=4.3.0, status=deferred (temporary failure. Command output: Can't open log file /var/log/dovecot: Permission denied )

What should the permissions on /var/log/dovecot be? (they are 640 root:wheel on FreeBSD, identical to mail.log)