[Dovecot] Connection refused userdb lookup ..dovecot/auth-userdb

[Simon]

Hi There,

Ive taken a look at this and cant quite figure out what is going on here. I have tested all the SQL permissions, and also changed the unix_listener auth-userdb mode to 0666 (as instructed elsewhere to try and solve this issue), but cannot seem to work out what the issue is. 

Would someone be able to please point me in the correct direction here?

Output of log + dovecot -n via this link:

http://pastebin.com/wsUt0eEF

# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.el6.centos.plus.x86_64 x86_64 CentOS release 6.5 (Final) xfs

Thanks

Simon