Alfredo Saldanha:
> Hello people
> I'm trying to setup sender must be tha same sasl user authentication, but I 
> don't care where the connection comes from or is going.
> I'd like only to prevent fake sender. I've tried 
> 'smtp_sender_dependent_authentication = yes', but I think that is not enough.
> Some tip?
> 

Maybe:
http://www.postfix.org/postconf.5.html#smtpd_sender_login_maps
http://www.postfix.org/postconf.5.html#reject_sender_login_mismatch

Postfix also has reject_authenticated_sender_login_mismatch and
reject_known_sender_login_mismatch for corner cases.

        Wietse

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