Incorrect permissions set for new domains for email
After upgrading to 3.0.5.3 version, I have problems while creating new email domains. The domain directory in /var/vmail has root:root owner and the domain users cannot authenticate in the mailbox.
I found this error in syslog:
ns230763 dovecot: dovecot: Fatal: chdir(/var/vmail/mydomain/mailbox/) failed: Permission denied (euid=5000(vmail) egid=5000(vmail) missing +x perm: /var/vmail/mydomain)
I manually changed the directory owner to vmail:vmail and then the user was able to authenticate.