The relevant RFCs make it clear what is a correct eMail address. Why should we have to put with lazy or incompetent coders who can't be bothered to meet the standard?
You probably got me wrong. In a perfect world, it would work just as specified in the RFC, everywhere and I am all for that. But obviously that's not the case.
And I am not encouraging people to be lazy and sloppy, I am just saying considering the 'real world', you are better off with an email-address that does not contain any too unusual characters (e.g. - _ . should be fine, as those are commonly used).
When that's the behavior of the 800-pound gorilla, then the answer is yes. IE6 didn't know what counts as valid DOM or CSS but everybody else adapted to it.
