Switching to dovecot LMTP appears to have changed the information in the
received header:
Here’s what the received header used to look like:
Received: from [10.0.5.3] (c-71-229-144-93.hsd1.co.comcast.net [71.229.144.93])
by mail.covisp.net (Postfix) with ESMTPS id B67B8118AD59
for <kr...@kreme.com>; Sun, 16 Aug 2009 22:19:02 -0600 (MDT)
As opposed to now:
Received: from darth.lan (c-73-14.161.160.hsd1.co.comcast.net [73.14.161.160])
by mail.covisp.net(Postfix 3.4.5/8.13.0) with SMTP id unknown;
Sun, 16 Jun 2019 15:26:32 -0600
(envelope-from <kr...@kreme.com>)
The first has an ESMTPS id and the other has SMTP id unknown.
Any ideas why this might have changed?
(In both cases the email is sent via an authentication submission on port 587
(or possibly 465 in the latter case).
submission inet n - n - - smtpd
-o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
-o smtpd_sasl_type=dovecot
-o smtpd_sasl_security_options=noanonymous
-o smtpd_sasl_path=private/auth
-o syslog_name=postfix/submit
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
-o smtpd_data_restrictions=
-o
smtpd_relay_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
-o smtpd_helo_restrictions=
-o
smtpd_recipient_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
smtps inet n - n - - smtpd
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
-o smtpd_sasl_type=dovecot
-o smtpd_sasl_security_options=noanonymous
-o smtpd_sasl_path=private/auth
-o smtpd_data_restrictions=
-o
smtpd_relay_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
-o smtpd_helo_restrictions=
-o
smtpd_recipient_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
