I just append something to my Gmail address with a plus character. Like: myaddress@gmail.com might become myaddress+hackernews@gmail.com. I can then set up filt

I just append something to my Gmail address with a plus character. Like: myaddress@gmail.com might become myaddress+hackernews@gmail.com. I can then set up filters to sort or delete specific sources of mail. According to Wikipedia, this is called "sub-addressing".