postfix-users October 2010 archive
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postfix-users: Re: ..::Spoofing Issues::..

Re: ..::Spoofing Issues::..

From: Noel Butler <noel.butler_at_nospam>
Date: Wed Oct 06 2010 - 22:54:00 GMT
To: postfix-users@postfix.org

On Wed, 2010-10-06 at 12:13 +1100, James Gray wrote:

> > We've used it for years, had very little complaints, maybe half a
> > dozen in all that time.
> > SPF is a "must use" IMHO, and by use of "-all" ... providing you
> > configure your DNS correctly.
> >
>
>
>
> ...and then a user puts in a .forward file (or equivalent) to send
> mail to another address. Now SPF if broken on the forwarded account
> as your mail server very likely doesn't have an SPF record for the
> original sender. Ooops - SPF is broken in these

Either its too early in teh day , or,.... because what you typed, makes
no sense, how do you think mailing lists continue to work.
Granted, with M$'s spf2 implementation (RFC 4406 IIRC) it does break,
but not utilising RFC 4408.
As I said, I've i've used it for years and years and I'm happy with its
results, YMMV of course which is why you are anti.