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Scott Wunsch writes:
>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?
.forward on mail.example.com:
"| /usr/sbin/sendmail -oi user at foo.com"
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