[Mimedefang] $RelayHostname not matchingsendmail's Receivedheader?
David F. Skoll
dfs at roaringpenguin.com
Sun Dec 10 19:36:24 EST 2006
John Rudd wrote:
> You're right, I couldn't just look at if it's an SPF pass, it would have
> to be an SPF record that specifically mentions the host.
SPF is under the control of the attacker. Maybe an "all" entry is
too obvious. What about these four entries:
0.0.0.0/2 184.108.40.206/2 220.127.116.11/2 192.0.0.0/2
which together are equivalent to "all"?
> So, the SPF record has to explicitly mention the host for me to exempt
> it. A SOHO type mail server can/will probably accommodate that
That's true. It's a usable heuristic.
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