spf-discuss
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[spf-discuss] Re: register.com, and other registrars, publishing SPF

2006-12-09 17:15:22
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Alex van den Bogaerdt wrote:
This is a message based on information from Thomas Zehetbauer
who is unable to subscribe to this list.

(N.B.: list admin: please try to subscribe him if you can, using
email address <thomasz(_at_)hostmaster(_dot_)org>.  The request is confirmed
in RT ticket # 11814)

Done.  Thomas should be subscribed now.  I can't do anything about Listbox 
looking the DUL RBL, though.  (If Thomas being listed there still prevents 
him from posting to the mailing list, then I can try explicitly approving 
him for posting to the list, but if that doesn't help, then that's that.)

(side note: in hindsight it would make sense to have another default
for "all", but we don't.  The default result is "+", just like it is
for any other mechanism.)

No, that would be confusing.  Instead, we should have better tools that 
warn against using "all" or "+all".

Why did Tom report this in the first place?  He thinks SPF_PASS is
a reliable indicator of a message not being spam.  I tried to convince
him this is not the case, but failed to do so.

Thomas, I read you saying "SPF_PASS has however been a very reliable 
indicator that a message is not spam" in your original correspondence with 
Alex.  By accident, this may be true.

However, it should be pretty obvious that this assumption can NOT generally 
hold.  If I was a spammer, I would just register a domain and publish
"v=spf1 +all", and thus trick people thinking like you into accepting my 
spam.

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