Re: SPF deployment, was RFC 3929 on Alternative Decision ...

John Levine writes:

> > > and how spammers are adapting/ Ciphertrust says they've seen more
> > > spam than good mail pass SPF checks.
> >   I hope you're not implying that that's a bad thing.
> No, of course not.  But it reminds us that anyone who thinks he's
> going to block a lot of spam merely by rejecting mail that fails SPF
> or any other sender/IP check is likely to be disappointed.  It may
> block some now, but spammers have reminded us that they'll adapt.
And, when they do, the methods used to fight them will adapt also.

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