(newbie) sendmail Masquerading Help?

Alexander Dalloz alexander.dalloz at uni-bielefeld.de
Sat Aug 14 22:13:20 UTC 2004


Am Sa, den 14.08.2004 schrieb Harry Putnam um 23:40:

> Jorge posted:
> 
> >> >>> MAIL From:<jorge at satyr.bogus.jl> SIZE=334 AUTH=<>
> >> <<< 553 satyr.bogus.jl does not exist
> >> 501 5.6.0 Data format error
> 
> Alexander responded:
> 
> > That error message makes sense! Not the originally posted. Your host
> > rejects unresolvable domains, which is a proper setting.
> 
> I don't think this message is from his HOST.  Its from the Smart host
> he is directing his sendmail MTA to at something like:
> [smtp/mail].verizon.net.

From what Jorge quoted as communication is the SMTP dialog with his
Sendmail, not the MTA of verizon.net. Please review the whole process
Jorge posted. Even if you use a smart host with Sendmail, the local
Sendmail acts as an intermediary, it queues the mail to send out until
it got processed with the smart host.

I would like to see what Jorge has in his /etc/hosts file, for localhost
and satyr.bogus.jl.

> It is unable to lookup his bogus fqdn.  And unless he masquerades as
> an domain that machine knows, it will not let him relay.  Hence his
> setting Masquerade_as = verizon.net.  Seems correct to me.

That the FQDN couldn't be looked up irritated me too. Whether verizon
requires a resolvable FQDN for all who send mail through their customers
MTA (acting as smart host) should be pointed out by the support of
verizon.

Alexander


-- 
Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13
Fedora GNU/Linux Core 2 (Tettnang) kernel 2.6.7-1.494.2.2smp 
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