Re: I've seen a definite uptick in these
"It only costs a few quid a year to own your own domain"
You can get freebies to, from places like freedns.afraid.org.
As for your own mail server, if you have a typical Linux or BSD installed, chances are you already have a local only email server. If you have a static IP, open it up to the world, done. Oh, and turn off relaying, or find yourself on spam blacklists fairly quickly.