I also hosted my mail directly with Postfix and Dovecot back in the day before the all-in-one packages were a thing.

mailcow has reduced my yearly maintenance from a few hours to a few minutes. Addtionally it runs in Docker, meaning each service is fully isolated and it can be updated with a single command and without headache. Also includes a really handy web interface to configure each of the services, it even does 2FA if you are worried about security.

Have been running it since before it was using Docker and have 0 complaints, it always works and always improves.