Yes, dovecot and postfix are both restarted on each change I make to the config files.

On Fri, Jun 21, 2013 at 1:40 PM, Luca Fornasari <luca.fornasari@gmail.com>wrote:

On Fri, Jun 21, 2013 at 12:54 PM, Adam Ramirez <smadam9@gmail.com> wrote:

...

---> dovecot: lda: Error: userdb lookup: connect(/var/run/dovecot/auth-userdb) failed: Connection refused

[...]

...

unix_listener auth-userdb { group = vmail mode = 0644 user = vmail }

File permissions on auth-userdb

srw-r--r-- 1 vmail vmail 0 Jun 20 13:04 /var/run/dovecot/auth-userdb

[...]

The default 0666 mode allows anyone to connect to the socket, but the

userdb lookups will succeed only if the userdb returns an "uid" field

that

matches the caller process's UID. Also if caller's uid or gid matches

the

socket's uid or gid the lookup succeeds. Anything else causes a

failure.

...

I have tried changing the permissions and owner of auth-userdb to 777 and dovecot:dovecot, but there wasn't a change.

This sounds strange; did you restart dovecot and Postfix?

Cheers, Luca