Sneaky Spammers...?

[Paul Welsh]

----- Original Message -----
From: "Mike Zanker" <mike at ZANKER.ORG>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: 02 March 2003 17:40
Subject: Re: Sneaky Spammers...?


> No, it's deliberate - spammers have been using secondary or even
> tertiary MX hosts for months now. Some of the spamming software
> available does this automatically now.

Yes, I agree.  That's why I like SpamAssassin, because it goes further
than checking just the last hop with RBLs.

If your secondary MX belongs to your ISP (who tend not to use RBLs) then
blocking using simple RBLs on your primary MX does you no good at all.