I've been following this thread and wondering how in the world one can
do this without excluding your own users' mail. We frequently have
users who are at "foreign" IP addresses (i.e. not in our IP block) who
are sending mail *through* our system (using DRAC) *to* on campus
addressees *from* their on campus address. In a case like that, the IP
address is going to be outside our netblock, yet the mail is completely
legitimate.

How in the world are you going to be able to distinguish the "good guys"
from the "bad guys"?

Paul Schmehl (paulsutdallas.edu)
Supervisor of Support Services
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/~pauls/

> -----Original Message-----
> From: Russell Mosemann [mailto:mosens.cune.edu]
> Sent: Tuesday, August 06, 2002 9:44 AM
> To: postfix-userspostfix.org
> Subject: *canonical_maps and restriction classes?
>
>
> This doesn't look possible from the man page, but I have to
> ask. Can restriction classes or something like it be used
> with *canonical_maps?
> After the recent discussion of spammers sending mail From:
> bigbossmydomain, I realized that my sender_canonical_maps
> would rewrite the incoming, fake From: address into canonical
> form. :-)
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