I am in the process of moving from my old mail server to my new mail server (FreeBSD/Postfix/Courier to OpenSolaris/Postfix/Dovecot -- transition story for another day when it isn't quite so traumatic).

So, I set up the new one as a secondary MX.

And almost 1/3 of my spam changed over.

Okaaaay.  Well, at least I know the new server is running.

So, that brings up an interesting question.

Is there any system to use attempts to scan/access a secondary MX as a way to blacklist hosts?

Thanks,
-a


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