Over 3 years running mailinabox. Zero problems after first month of hiccups.

Installed a second server last year. That had 0 problems since day 1.

I feel like people overblow the whole email thing. Want you to pay for tuta et al when you can build your own and manage it.

I havent updated both servers in a year. Zero problems.

Again, people maybe confuse miab and other email servers maintenance with maintaining nextcloud which is a real pita