I have a mail server in AWS that is currently running Ubuntu 18. Every
time I log in, I am reminded that I can upgrade to Ubuntu 20.
On Ubuntu 18, postfix is version 3.3.0-1ubuntu0.3. On Ubuntu 20,
postfix would be upgraded to 3.4.10-1ubuntu1. Many other packages,
probably including the mysql server, would also be upgraded.
Both postfix and dovecot use a postfixadmin database in mysql for users.
I have postfix using amavisd-new for spam/virus checks and dovecot-lda
for delivery.
I've been a little bit terrified of doing an upgrade, because I do have
a couple of people using my mail server for real work email and I don't
want to disrupt them.
I'm writing today to find out what are the likely pain points I might
encounter when doing this kind of major upgrade, and if there is any
helpful information that can help me get through those problems. I'm
hoping that it will go smoothly and everything just works.
Here's the postconf -n output:
https://apaste.info/jdKV
If I have been silly enough to include sensitive data from the config, I
would appreciate a heads up so I know what passwords to change. I did a
quick glance and didn't see anything.
Thanks,
Shawn
