Viktor, Thanks for the hint. The transport map seems do the trick...
/etc/postfix/main.cf transport_maps = hash:/etc/postfix/transport /etc/postfix/transport mypartnerorg.com : mycompany.com : * error: 5.1.2 recipient domains not allowed Thanks, Steve -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Viktor Dukhovni Sent: Tuesday, February 17, 2015 10:48 AM To: postfix-users@postfix.org Subject: Re: smtpd_recipient_restrictions to restrict outbound email to selected domains On Tue, Feb 17, 2015 at 06:35:11PM +0000, Steve Zeng wrote: > > Via SMTP from outside, or via sendmail(1) locally? > > I run mail locally as below: > mail -s "hotmail" myusern...@hotmail.com < /etc/hosts Well, smtpd(8) restrictions don't apply to locally submitted email. I generally configure the default Postfix instance (that handles local mail injection) as a null client (as in MULTI_INSTANCE_README) and that makes it possible to use transport_mapa, and/or default_transport to control which destinations are reachable by adding "error:5.1.2 ..." transport overrides. The network-facing MTA runs as a separate Postfix instance, in which local submission is restricted: authorized_submit_users = root, postfix -- Viktor. NOTICE: This email message is for the sole use of the addressee named above and may contain confidential information. Any unauthorized review, use, disclosure, distribution or duplication of this message or any attachments is expressly prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies and backups of the original message.
