How often are you verbally giving your email over the phone that this an issue? Unless you're ordering daily from the Home Shopping Network and want to get an email receipt, what's the big deal? In my experience either I'm entering my email in a web page form or texting it to the other person.
You'd be better off taking an "xkcd" or "gfycat" approach and making your e-mail "[email protected]" or "[email protected]".