Add logging info for untrusted sender

[Loïc Elineau]

Thanks,
I'll give a look at kolab's postfix configuration and try this

> >
> > Is there a way to block untrusted sender if they pretend being from a
>
> domain
>
> > at the kolab server? Another solution should be to add logging info to
> > portfix.log (and thus eject them thew fail2log). But how to
> > achieve this?
>
> I don't use this within Kolab as I use a Postfix relay server but on that
> server I have
>
> In main.cf:
>
> smtpd_recipient_restrictions = (lots of stuff),
>                                permit_mynetworks,
>                                check_sender_access
> hash:/etc/postfix/sender_checks,
>                                (lots of stuff incl rbl checks)
>
> And in /etc/postfix/sender_checks I have
>
> # disallow any incoming supposedly from one of our peebles
> arcus.co.za                     550 Illegal sender domain part
> arcusgibb.co.za                 550 Illegal sender domain part
> gibb.co.za                      550 Illegal sender domain part
>
> Where these are my domains. Since my Kolab server is on a trusted network,
> this rule does get applied to outgoing email. It blocks anyone attempting
> to fake my domains.
>
> I'm sure this could easily be adapted to a situation where the Kolab server
> is not using a relay server.
>

Regards,

-- 
Loïc Elineau
http://www.benefacere.fr/