Dnia Fri, 23 Jul 2004 09:39:38 +0200
Georges <void@void.com> Napisal:

> Hi.
>
> My provider has an IP spoofing protection enabled. This makes mail
> relaying impossible. I explain ...
>
> I am "user1@ere.com". I have another e-mail address ("user2@tobi.com"),
> which I forward to "user1@ere.com".
>
> user2@tobi.com -> user1@ere.com
>
> Is this the normal configuration of postfix ???

No, you need some external filter. Like rmxf or other used probably as
policy_delegation. Which checks for some kind of spf records or even A or
MX addresses.
This filters are real virus/spam killers. The only way some self sending
worm can hit You (with A or MX checks on) is by sending him first for
some list, where you are subscribed, or for forwarded mail. It is great
help when there are new viruses in town, and anty-vir signatures do not
match them yet.

But, Your question is probably like: how to forward with such mechanism
turned on.
If You can use something that rewrites envelope sender on tobi.com then it
should work. One choice is procmail.

pozdr.
Janek

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