Full disclaimer : I’ve only ever used stalwart. Started with it and had no reason to change.

Been using it for about a year as a mail server for my services.

The set up is simple, configuration can be done through the webui or the conf files.
Creating users, mails, aliases etc is very straight forward.
Everything is pretty much painless, the documentation has almost everything you might need.
You can also configure automatic cert renewal. Something else I really like is that when you add a domain (you can have multiple) it also gives you the DNS configuration to add to your DNS server.

Honestly I’d say it’s a solid choice. On my side it’ll be part of futur projects where a mail server is needed.

I just read a bit about it and it sounds quite interesting with the community aspect of it all. I’ll give it a deeper look later, thanks !

Lets fucking gooooo !! Thanks !!

Damn I wish ! I just checked their website and did not see any mention of purchasing a shirt like that. They do however reward you with a shirt if you contribute to the project (fast relay, research, translation etc…)