Steven D'Aprano <steve+comp.lang.python at pearwood.info> writes: > Why do you want to write buggy code that makes your users hate your > program? ... > The only way to validate an email address is to ACTUALLY SEND AN EMAIL TO > IT. Of course spamming people will make them hate you even more. Insisting that people give you a valid email address (unless you have a demonstrably legitimate use for it) is a variant of that.