On Fri, 09-Jan-2004 at 11:46:08 -0000, Kenn Humborg wrote:
> With all the hoopla recently about SPF (sender permitted from)
> records, there is one thing that I still have doubts about:
> backup MX servers.
That's nothing. What about a user who has an email address
user at example.com, and then moves over to the foo.com domain, and sets up
mail forwarding from user at example.com to user at foo.com?
Now user1 at sender.com sends an email to user at example.com, which is accepted
by the server for example.com (say, mail.example.com). Now
mail.example.com forwards the mail on to the foo.com server for
user at foo.com. But the foo.com server does an SPF check for sender.com, and
sees that mail.example.com isn't permitted, and rejects the message. Oops?
--
Take care,
Scott \\'unsch
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