Am 15.06.2014 22:01, schrieb Eliezer Croitoru:
> I Have been reading:
> http://www.postfix.org/ADDRESS_VERIFICATION_README.html
> http://www.postfix.org/SMTPD_ACCESS_README.html
> http://www.postfix.org/RESTRICTION_CLASS_README.html
> 
> And I am still unsure on how to go one step forward..
> I want to allow my local SMTP authenticated users to be able to send only 
> with a From of the local domains of the
> local service.
> For example I have about 10-20 domains that the server is serving and I want 
> to allow to send from domains:
> example.com    OK
> hotmail.com    REJECT
> example2.com    OK
> etc...

what you describe is *the minimum* requirement of a sane MTA
you must not allow senders you would not accept incoming messages
and no - there are no exceptions for whatever user

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

reject_unauthenticated_sender_login_mismatch
 Enforces the reject_sender_login_mismatch restriction for unauthenticated
 clients only. This feature is available in Postfix version 2.1 and later.

smtpd_recipient_restrictions = permit_mynetworks
 reject_non_fqdn_recipient
 reject_non_fqdn_sender
 reject_unlisted_sender
 reject_authenticated_sender_login_mismatch

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