On Fri, 18 Jun 2004 16:01:00 -0400, Meng Weng Wong wrote:
<snip>
192.0.2.1 sends mail with
HELO example.com
MAIL FROM:<user(_at_)example(_dot_)com>
From: <user(_at_)example(_dot_)com>
192.0.2.10 sends mail with
HELO mx10.example.com
MAIL FROM:<user(_at_)example(_dot_)com>
From: <user(_at_)example(_dot_)com>
192.0.2.11 sends mail with
HELO mx11.example.com
MAIL FROM:<user(_at_)example(_dot_)com>
From: <user(_at_)example(_dot_)com>
Unified SPF asks example.com to publish four SPF
records:
example.com TXT "v=spf1 a mx -all"
www.example.com TXT "v=spf1 a -all"
mx10.example.com TXT "v=spf1 a -all"
mx11.example.com TXT "v=spf1 a -all"
<snip>
Not happy to disagree with Meng, but here goes
In the above example SPF records, I believe that
www.example.com TXT "v=spf1 a -all"
is incorrect, and should be
www.example.com TXT "v=spf1 -all"
Since www.example.com should/would never be a sender domain,
and for a bounce it would use it's HELO of example.com as the
sender domain
Regards
Karl Prince
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