Re: [exim] Yet Another ANTI-SPAM Trick

Autor: Andrew
Fecha:
A: Marc Perkel, exim-users
Cc:
Asunto: Re: [exim] Yet Another ANTI-SPAM Trick

Hey,

Seems like a good idea....

... I will have to try/test .

Cheers,
A.

Marc Perkel wrote:

> Again - noticing that I get a lot of spam atempts on the HIGHEST MX
> record - I sert up a FAKE IP address for my highest MX.
>
> I now have 3 MX records:
>
> smtp1.ctyme.com - mail server
> smtp2.ctyme.com - real backup server
> smtp3.ctyme.com - fake backup server
>
> The 3rd server - which is really just a different IP address on my
> main server always returns DEFER creating a temporary error. Many
> spammers never retry so the spam goes away. Is a very inexpensive spam
> deterrent and have very low cost in computer resources.
>
> defer log_message = Spammer Connected to FAKE highest MX record > condition = ${if > match{$interface_address}{209.237.228.13}{true}{false}} > delay = 3m

>
> The delay gives me the illusion I'm punishing them.
>
> There's no email losses because real email will eventually retry the
> mail real server on the lowest MX record.
>
>
>

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