[nix23]

But i want imap too, and a web-mail, oh and a Calendar and contact (with team-functionality) too, synchronize them to my phone, and i want sieve functionality, anti-spam, and because it's written a pseudo antivirus-solution. And a self-service solution so users can reset the password with 2FA...still easy?

[tridentlead]

Yes, generally if you over-complicate something it becomes over-complicated.

[nix23]

So you give your users the root password so they can change the password them-self....oversimplification often solves just a small portion of a bigger problem.