From: Jack Sasportas (JackInnovativeInternet.com)
Date: Tue Jul 01 2003 - 18:58:00 CDT

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  That sounds correct, and I beleive the spammers are intentionally
targetting those backup mx's for the very reasons you stated hoping a
few extras will go through.

Jack

Dean Gibson (Mail Administrator) wrote:

> In the thread "Recipient verification functionality request", Wietse
> Venema wrote:
>
>> ...
>>
>> If you're backup you don't receive their mail while their primary
>> server is up. You get mail only when it is down.
>>
>> Wietse
>
>
> This is a question about the above statement. My understanding is
> that the above is indeed how it's supposed to work, but in my
> experience, about 25% of the spam we receive is received by our backup
> MX server, without the primary server ever having been contacted. My
> guess is that the spammers perhaps believe that the backup MX server
> is likely to have less stringent anti-spam measures, since it has to
> forward/relay mail to the primary server.
>
> That used to be true in our case several years ago when we had our ISP
> be the backup MX server, but when spam started to come through the
> backup MX server, we dropped the ISP as the backup MX and set up our
> own backup MX server, which has identical policies to the primary.
>
> Or am I misunderstanding something in the terminology?
>
> -- Dean

--
___________________________________________________________
Jack Sasportas
Innovative Internet Solutions
Phone 305.665.2500
Fax 305.665.2551
www.innovativeinternet.com
www.web56.net
 

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