I self host email. Email is easy. I went a tad overboard with database configuration, a configuration/password change program, a few virtual hosts so I can renew six different names, but a single domain on a Linux box (any flavour) is easy

It makes it easy to make a bespoke email address for every entity you interact with, or show them the respect they deserve by giving your valid email spam@your.domain.tld

It is a bit of a hobby though. You need to keep up with email security if you want to send to anyone.