Validation fails for [DataType(DataType.Email)] in MVC3

It seems that the internal validation in the DataType DataAnnotation for DataType.Email fails when the email address starts with a number. I ran into this when a user with a 1234Something@gmail.com style email address tried to register on my site and their address was reported as "invalid". After some experimentat开发者_StackOverflowion, it seems that the leading digit is the culprit.

I haven't been able to find anything about this online. Anyone know if it's a known issue, or did I by chance discover a new bug? :) Is this something about the standard email address format that Microsoft got right and Google is doing incorrectly? Is there a work-around?

Scott

According to the RFC 5322 specification there doesn't seem to be any restriction to limiting email addresses to not start with a digit.

Reading Wikipedia also implies it being completely valid.

To test this I created a Live.com email account that started with a number and it went through no problem.

So I suppose this is an issue. The best way to correct it would be to make you're own regex for the email.

You can create a regex validator

[RegularExpression(@"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$", ErrorMessage="Invalid email")]
public string EmailAddress { get; set; }

This regex was taken from Microsoft's source in MVC3. It's from the futures project and attached to a validator called EmailAddressAttribute