On Fri, Nov 28, 2014 at 11:34:54AM -0500, Raman Gupta wrote:
> The default setting of unknown_address_reject_code is 450
> (http://www.postfix.org/postconf.5.html#unknown_address_reject_code).
Once your system is correctly configured, by all means change it
to 550. The default is a safety measure for new users. I have:
unknown_address_reject_code = 550
unknown_client_reject_code = 550
unknown_hostname_reject_code = 550
unverified_recipient_reject_code = 550
unverified_sender_reject_code = 550
You can in most cases leave
plaintext_reject_code = 450
at its default. Whether to make a 5XX depends on whether and
how you're using reject_plaintext_session.
--
Viktor.
