One of my primary pet peeves with Gmail. It leads to a lot more junk mail arriving in my inbox. My real Gmail address is 'first.m.last', and almost all the spam I get is addressed to 'firstmlast'. Gmail is great at filtering out spam so that I don't see most of it, but if not for their unconventional filtering of recipients, I'd get even less. I also get a lot of email from idiots who don't know their own address and provide mine instead, and literally all of that would bounce without their . handling.