When postfix was on a previous server, I had some of the following parameters set for my main.cf file in order to allow relaying only for those users local to that server. The parameters provided below are those that seem to me most critical in resolving this issue. Nonetheless, local users can only send to other local users. Outside user can send to local users.

smtpd_sasl_auth_enable = yes

smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unknown_recipient_domain, reject_unknown_sender_domain, reject_non_fqdn_recipient, reject_non_fqdn_sender, reject_unauth_destination, permit
smtpd_client_restrictions = permit
smtpd_helo_restrictions =
smtpd_delay_reject = yes


relay_domains =


One thing I forgot to add: actually, so long as the user is within the network, they can send to anyone, but if outside the network, then they are restricted.



Curtis Vaughan North Pacific Corporation

WashTech (CWA Local 37083)
IWW x353203




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