On Thu, Jan 21, 2021 at 09:15:01PM +0000, Chris Green wrote:
> The VPS has postfix version 3.3, my desktop has version 3.5.6, am I
> likely to encounter any problems with a similar main.cf on the older
> version? I realise I have to change the myorigin, mydestination and
> myhostname but I'm hoping that's basically all.
Not likely, but you can always check the release notes:
https://github.com/vdukhovni/postfix/blob/master/postfix/RELEASE_NOTES-3.4
https://github.com/vdukhovni/postfix/blob/master/postfix/RELEASE_NOTES-3.5
to see what changes were introduced between the two releases, and
whether you've managed to create a bleeding-edge configuration
that relies on Postfix 3.4 or 3.5 features.
An average user is unlikely to have any issues going back to Postfix 3.0
or even 2.10, except perhaps when using DANE, which requires 2.11, or
SNI support which requires 3.4 (or 3.5).
You can always check the postconf(5) manpage for 3.3:
$
url="https://raw.githubusercontent.com/vdukhovni/postfix/postfix-3.3/postfix/man/man5/postconf.5";
$ curl -sLo - "$url" | nroff -mandoc | less -R
to see whether any of the settings you're using are undocumented or
documented to behave differently (very unusual with Postfix) in 3.3.
--
Viktor.
