Please stop giving my email address to weird SMS and mobile clients. It's exceedingly impolite and rude. If you've given it, please withdraw it. I'm tired of getting spam from them, and I'm not going to confirm that my email address is legit so they can sell it later.
I mean it, it's really, really fucking annoying.
btw: that goes for those filthy third-party internet address books, too, especially the ones that send email out to your friends asking them to "update their information" for you. Get a hard-copy address book if you're that godsdamned forgetful.