When I first started hosting my own domain five or so years ago, I was happy to discover this really neat thing called a catch-all email account. Basically, I can set up as many static email addresses as I want or need, but any unrouted mail, no matter who it’s addressed to, is redirected into the main catch-all account.
This comes in handy for tracking who I’ve given my email address to (among other obvious reasons). For instance, if I were dealing with a fictional company called Wally’s Widgets, Inc., I might give them the address, [email protected]. That way, if I start getting a lot of junk mail pointed to that address, I know it’s either coming from Wally’s Widgets, or Wally’s Widgets has sold my email address to the evil spammers. Over the years that’s happened with a few of the addresses I’ve given out, and when it does I simply add that address to a server side filter that bounces those emails.