Sneaky Spammers...?

[Spicer, Kevin]

> It looks to me like mail is rejected at the MTA by DNS 
> blacklists.  The spam
> is then routed to the backup MX and it seems that when mail hits the
> secondary MX (even though the originating server was blacklisted), the
> backup allows the spam in because it is only spooling for the 
> domain (for
> some reason).  I may have this explanation all screwed 
> because I just woke
> up, but I see this all the time as I do backup MX for lots of 
> domains where
> the primary is also running MS/SA/DNSBL's.
> 
No I think this is a deliberate ploy because...
1) I haven't got any blacklisting turned on (although the way things are going I may review this soon!)
2) Mails are coming via both backup MX's - if it was as you suggest then surely they would only be coming via the higher priority one?



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