Hello all,
I have been trying to setup my Postfix server as follows:
a) Clients need to use STARTTLS + Authentication in order to send mail using my
SMTP Server. They can only submit mail on port 587 (25 for submission is
disallowed).
b) Port 25 is to be used for MTA-to-MTA communication and should still accept
mail for all domains that my server is the final destination for.
I have attempted at setting this up however I am unable to send mail to
external domains. I am now prevented from sending mail through 25 as designed
and can still however send to myself (or other recipients that are hosted on my
server). I would appreciate any insight regarding my goal as previously
described.
Relevant configuration entries:
-------main.cf--------
smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination
-------master.cf-------
submission inet n - n - - smtpd
-o smtpd_enforce_tls=yes
-o smtpd_sasl_auth_enable=yes
-o smtpd_sasl_type=dovecot
-o smtpd_sasl_path=private/auth
-o smtpd_client_restrictions_permit_sasl_authenticated,reject
Any insight is greatly appreciated!
Thanks again,
Dan
