The regex for email addresses in the MSDN website sucks a bit, it may work in code-behind but not in the .aspx file in which the server script for RegularExpressionValidator is found. Insert this string into the ValidationExpression property of your RegularExpressionValidator: (works like a charm)


I found this piece of code in this site: (it is found near the bottom of the page)
Thanks so much "djrulz"