Date: Wed, 12 Sep 2001 05:14:58 -0700 (PDT) From: "Jonathan M. Bresler" <jmb@hub.freebsd.org> To: setantae@shaft.techsupport.co.uk Cc: postmaster@FreeBSD.org, freebsd-questions@FreeBSD.org Subject: Re: Why, this is new (and BAD, BAD, BAD!!) ... Message-ID: <20010912121458.CAA1B37B401@hub.freebsd.org> In-Reply-To: <20010911110508.A22305@shaft.techsupport.co.uk> (message from setantae on Tue, 11 Sep 2001 11:05:08 %2B0100) References: <20010911110508.A22305@shaft.techsupport.co.uk>
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yes it is BAD that your machine claims to be:
cartman.private.techsupport.co.uk
when
that name resolves to 10.5.4.106
and 10.5.4.106 does not resovle to
cartman.private.techsupport.co.uk
why not use cabletel1.cableol.net (194.168.3.4) on the helo line?
why does the box claim to be what it is not?
jmb
> Date: Tue, 11 Sep 2001 11:05:08 +0100
> From: setantae <setantae@shaft.techsupport.co.uk>
> Cc: freebsd-questions@FreeBSD.org
> Content-Type: text/plain; charset=us-ascii
> Content-Disposition: inline
> User-Agent: Mutt/1.2.5i
>
>
> [ceri@cartman ceri]$ exim -v -qf
> Single queue run
> LOG: 0 MAIN
> Start queue run: pid=4239 -qf
> delivering message 15gkCn-000135-00 (queue run pid 4239 fd 5)
> Connecting to hub.freebsd.org [216.136.204.18.25] ... connected
> SMTP<< 220 hub.freebsd.org ESMTP Postfix (Postfix Rules!)
> SMTP>> EHLO cartman.private.techsupport.co.uk
> SMTP<< 250-hub.freebsd.org
> 250-PIPELINING
> 250-SIZE 10240000
> 250-ETRN
> 250 8BITMIME
> SMTP>> MAIL FROM:<ceri@techsupport.co.uk> SIZE=2537
> SMTP>> RCPT TO:<freebsd-questions@freebsd.org>
> SMTP>> DATA
> SMTP<< 250 Ok
> SMTP<< 450 <cartman.private.techsupport.co.uk>: Helo command rejected: Host not found
> SMTP<< 554 Error: no valid recipients
> SMTP>> QUIT
> LOG: 0 MAIN
> == freebsd-questions@FreeBSD.ORG T=remote_smtp defer (0): SMTP error from remote mailer after RCPT TO:<freebsd-qu
> estions@freebsd.org>: host hub.freebsd.org [216.136.204.18]: 450 <cartman.private.techsupport.co.uk>: Helo command
> rejected: Host not found
> LOG: 0 MAIN
> End queue run: pid=4239 -qf
>
> So exactly how am I supposed to use a mail server that happens to be behind a
> firewall ? Make it lie about it's hostname in the EHLO line ?
>
> The IP that I come out of (194.168.3.4) has both forward and reverse DNS set
> up, which up until this morning was sufficient.
>
> RFC 1123 prohibits HELO-based rejections.
>
> Thank you ,
>
> Ceri
>
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