There’s no reason to do that, though. You can set your MX record to whatever you want for your domain. Why would you set yourself up to have to change your email? Not to mention advertising that your email is on a raspberry pi. Somebody will probably come along and DDOS that thing just for fun.

I just use that as a disposable email. I know there are better ways, but then with a subdomain, I can just experiment as much as I can.

I would like to believe that I have put the correct measures to prevent a DDOS attack, and it’ll be fun to combat a real time attack honestly