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Subject: Re: HELO and FQDN
From: Mark Tiramani (markjtfredo.co.uk)
Date: Thu Nov 02 2000 - 10:17:35 CST

More on the non-FQDN HELO rejection:

I had possibly misunderstood the generic restrictions and therefore used:

smtpd_client_restrictions = reject_non_fqdn_hostname, reject_invalid_hostname ...

Looking again I realise that reject_non_fqdn_hostname is not listed for smtpd_client_restrictions

However, postfix rejects a non-FQDN in the HELO with a '504 ... Helo command rejected: need fully....'
when reject_non_fqdn_hostname is used in smtpd_client_restrictions.

Do other smtpd client restrictions also map to smtpd HELO restrictions?

> Interesting, because the output lists no restriction that would
> reject non-FQDN hostnames in HELO/EHLO commands.
>
> When I apply these restrictions:
>
> % telnet localhost smtp
> Trying 127.0.0.1...
> Connected to localhost.
> Escape character is '^]'.
> 220 hades.porcupine.org ESMTP Postfix
> helo foo
> 250 hades.porcupine.org
> quit
> 221 Bye
> Connection closed by foreign host.
>
> There is no complaint about the HELO command. So, unless there is
> a way to reproduce the problem I won't be able to fix it.
>
> Wietse

Mark

Mark Tiramani
FREDO Internet Services
markjtfredo.co.uk