On Mon, 12 Jun 2006, jdow wrote:
> Date: Mon, 12 Jun 2006 01:23:30 -0700
> From: jdow <[email protected]>
> To: Bernd Petrovitsch <[email protected]>
> Cc: [email protected], [email protected]
> Subject: Re: VGER does gradual SPF activation (FAQ matter)
>
> From: "Bernd Petrovitsch" <[email protected]>
>
> > On Sat, 2006-06-10 at 22:17 -0700, jdow wrote:
> > [...]
> > > that matter. It simply says, "When I went and looked at the guy's claimed
> > > mail source the spf record said he was who he said he was." Who vouches
> >
> > No. SPF simply defines legitimate outgoing MTAs for a given domain.
> > Within a domain, it is up to the postmaster to allow/disallow address
> > forgery and for the rest of a world (to tell where legitimate email of
> > his domain comes from), the postmaster defines SPF records.
> >
> > Bernd
>
> And just recently we received a spate of spam that came from a domain
> that disappeared almost immediately. Domain names are cheap. They can
> vouch for the spam run. Then what happens to them doesn't matter. But
> the SPF record passes.
>
> {^_-} There Ain't No Such Thing As A Free Lunch.
> Too many people think SPF is a free lunch.
Look at it from a mail admin's perspective. The bounces are now going
nowhere instead of some poor user's mailbox. You have just cut the damage
in half.
Innerfire.net used to be foraged as a spam sender every other month and
[email protected] so often that I still have procmail filters to
redirect bounces to their own folder. The thousands of messages I was
getting was infuriating but it has been a very rare event since I setup
SPF on my domain.
SPF may not filter spam much but if you set it to autofail you can reduce
the risk for innocent mail admins.
Gerhard
--
Gerhard Mack
[email protected]
<>< As a computer I find your faith in technology amusing.
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