|🛈 SYSTEM INFORMATION|
Operating system Ubuntu Linux 20.04.3
Webmin version 1.984 Usermin version 1.834
On Jan 26, I upgraded to Ubuntu 20.04 (postfix v3.4.13), from 18.04 (postfix v3.3.0).
I noticed this warning in my syslog. I went back to my logs on the 25th and I had no warnings at all.
Feb 1 06:30:39 ns1 postfix/master: warning: duplicate master.cf entry for service “smtps” (465) – using the last entry
My /etc/postfix/master.cf has the following 2 smtps related entries:
smtps inet n - y - - smtpd -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_reject_unlisted_recipient=no -o smtpd_client_restrictions=$mua_client_restrictions -o smtpd_helo_restrictions=$mua_helo_restrictions -o smtpd_sender_restrictions=$mua_sender_restrictions -o smtpd_recipient_restrictions= -o smtpd_relay_restrictions=permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING
smtps inet n - y - - smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_wrappermode=yes
I have not made any config changes manually. Everything was done by Virtualmin in 2019. Also during the upgrade last week, I opted to leave all config files unchanged whenever I was given the option to replace with an updated file. I do not remember specifically if I was asked to do so with /etc/postfix/master.cf.
Bear in mind that I also noticed some other warnings that may be related to this warning.
Feb 1 06:30:39 ns1 postmulti: /usr/sbin/postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions
Feb 1 06:30:39 ns1 postmulti: /usr/sbin/postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_client_restrictions
Feb 1 06:30:39 ns1 postmulti: /usr/sbin/postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_helo_restrictions
These were fixed by adding the following to /etc/postfix/main.cf:
smtpd_restriction_classes = mua_sender_restrictions, mua_client_restrictions, mua_helo_restrictions
mua_client_restrictions = permit_sasl_authenticated, reject
mua_sender_restrictions = permit_sasl_authenticated, reject
mua_helo_restrictions = permit_mynetworks, reject_non_fqdn_hostname, reject_invalid_hostname, permit
Can anyone chime in and tell me which of the two lines should I leave in the master.cf file?