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.

If it’s not another name for it, it’s definitely very close to the Overton Window.

Thanks that’s good to know :)

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 !

What are the consequences of this particular patent expiring ?

Damn that’s some great work ! When I started linux I wish I had found such ressources, I was really curious what each of these directories were for.

Would you mind if your material was reused (with credit) for education purposes ?