[Dovecot] Mail undeliverable error

[Uldis Pakuls]

jan gestre wrote:
> Hi Guys,
>
> I've already posted this to the postfix mailing list and they made
> sure the error as the title suggest was generated by dovecot and not
> the other way around.
Yes, they are right :

Feb  1 21:26:42 mail postfix/pipe[19788]: D9A6D148050:
to=<postmaster at ddblocal.com>, relay=dovecot, delay=5.6,
delays=5.6/0.01/0/0.03, dsn=5.1.1, status=bounced (user unknown)

dovecot bounces message "status=bounced (user unknown)"
>   userdb:
>     driver: sql
>     args: /etc/dovecot-sql.conf
>   
You din't provide contents of  "/etc/dovecot-sql.conf".  Message is 
bounced as dovecot can't find "postmaster at ddblocal.com" in mysql database.
There is something wrong with configuration in "/etc/dovecot-sql.conf" 
or  mysql  database itself.

"when we transferred office, issues arose, suddenly users using email 
clients like thunderbird/outlook suddenly can't send mail when outside 
the office and instead gets an smtp denied"

If you use Dovecot SASL in Postfix to authentificate the users it fails 
to too...  this is why you got "smtp denied" errors. Relay rulues 
prevents unauthentificated users to send messages.

Check your userdb configuration an MySQL database itself.

Uldis