Re: patch to force helo or ehlo before any smtp command

On Wed, Oct 01, 2008 at 05:12:39PM +0200, Tullio Andreatta ML wrote:
> Jimmy Spam:
>>> what is the advantage of force ehlo?
>
> Aiko Barz:
>> Section: 4.1.1.1 (http://www.faqs.org/rfcs/rfc2821.html)
>> "In any event, a client MUST issue HELO or EHLO before starting a mail
>> transaction."
>>
>> You may block broken spammer software at a very early stage.
>
> ... but since Sendmail MTA required it from the beginning (when the
> only open source choice was SM), actually every spammer software sends
> HELO (very broken software too).

You are right. I looked at this issue closely today: Not one spam 
mail without HELO/EHLO.

> So who you will block with this patch?

At least there is a low risk for false positives, since Google and so
do the same...

So long,
    Aiko
-- 
:wq ✉

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