I have a well established 2.10 Postfix instance on 2.10 (CentOS7)
which is to be migrated to a new machine running Postfix 3.3 (on RHEL8).
I've been reading http://www.postfix.org/COMPATIBILITY_README.html,
and from what I can see the backward compatibility issues I may run
into are (with existing config from 2.10)
- append_dot_mydomain (not explicitly set on 2.10, i.e. implicitly "yes")
- chroot (explicitly set to n on 2.10 in master.cf)
- smtpd_relay_restrictions (explicitly set to empty on 2.10)
- mynetworks_style (not explicitly set on 2.10, i.e. implicitly "subnet")
- relay_domains (not explicitly set on 2.10, i.e. implicitly "$mydestination")
To re-use the existing configuration I'm thinking I need to:
1. explicitly set append_dot_mydomain to yes
2. explicitly set mynetworks_style to subnet (2.10 config =
"mynetworks = 127.0.0.0/8, 192.168.1.0/24")
3. explicitly set relay_domains=$mydestination
If I do those should I explicitly set compatibility_level, or would it
not be needed because I have addressed the compatibility issues?
And are there any other 'gotchas' to be aware of with this upgrade?
Thank you kindly.
Simon
--
Simon Wilson
M: 0400 12 11 16
