[Mimedefang] Pre-Emptive Greylist entries

[Matthew.van.Eerde at hbinc.com]

Ken Cormack wrote:
>> ... isn't it likely
>> that if spammers are going to the trouble to add SPF records that
>> they're also going to the trouble to retry after a tempfail, and
>> thus defeat greylisting? 
> 
...
> The people who obtain and USE the software to send spam
> will control the DNS domains they set up (BuyMyStuff.com, etc.) will
> control whether they want SPF records in those domains.

That is the sole purpose of SPF, to force domains that send spam to admit ownership of the sending servers.

If spammers set up SPF records, that's a major win for the anti-spam world.

-- 
Matthew.van.Eerde (at) hbinc.com               805.964.4554 x902
Hispanic Business Inc./HireDiversity.com       Software Engineer