I suspect if you shared more info about your mail infrastructure, it might reveal that what is working for you is too complicated for 99.9% of people to set up and maintain themselves.

I don't think the goal is that every non technical person can host their own mail infra.

But most people who can run a server should be able to setup OpenSMTPd with the DKIM filter and Dovecot. It's much easier than configuring postfix like we had to do in the past.

To answer a sibling comment, the last time I received an answer is a few minutes ago. The correspondent's email infra is hosted by Google.

You're right, it used to be a bit complicated. Now you just need to have a reputable and clean IP address, and knowledge of running some services in docker and of course understanding DNS and its crucial role for running a mail server.

I used to run all the components and maintain it (even that wasn't bad), but I changed to mailu[1] about a year ago

[1] https://mailu.io

It is probably because you have run it so long that you have good reputation and less issues. Too bad we don't have time machine to go back to ninties to start building up reputation.

Every single IT team I know wanted to get rid of the mails servers.

I don't know why. At the same time they don't want to get rid of the bbdd servers, or the app servers.

Maintaining a email service must not be as easy for them.

Have you had static IP since then? A problem is that most new mail servers will have IP address with history.

The current static IP (it changed over the years) I got in 2016 or so.

All the time. I use it in production and I have many users.

Well, it’s hard to beat 26 years of expertise.