On Fri, 20 Sep 2013, Craig Sanders <[email protected]> wrote:
> On Fri, Sep 20, 2013 at 02:50:55PM +1000, Russell Coker wrote:
> > <-  220 mx0.example.com ESMTP Postfix (Debian/GNU)
> > 
> >  -> EHLO example.com
> > 
> > [...]
> > <** 554 5.7.1 <[email protected]>: Sender address rejected:
> > forged mail
> > 
> >  -> QUIT
> 
> some questions that might lead you in the right direction:
> 
> does mx0 have server0.example.com in its my_destination?
>
> is there a check_sender_access map in main.cf listing server0.example.com?

No.  "grep server /etc/postfix/*" returns no matches.

> is there a check_helo_access map listing example.com? if it
> does exist, does it come *AFTER* or *BEFORE* permit_mynetworks,
> permit_tls_clientcerts, and permit_sasl_authenticated? the order of
> rules is extremely significant in postfix.

smtpd_helo_restrictions = 
permit_mynetworks,reject_invalid_hostname,reject_unknown_sender_domain, 
reject_non_fqdn_hostname, reject_unknown_sender_domain

Above is my only helo rule on that system.

Thanks for the suggestions.

James Harper's idea is interesting, is there any similar feature of Postfix 
for debugging these things?

-- 
My Main Blog         http://etbe.coker.com.au/
My Documents Blog    http://doc.coker.com.au/
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