Regular expression for email

Question

Possible Duplicate:
What is the best regular expression for validating email addresses?

I tried the reg expression

^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+

for the email validation.

Since I want the user to allow submitting even with the empty email address. So I changed the reg ex to

(^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+)?

But this expression accepts any email address without any validation.

Answer 1

Welcome. http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html

Answer 2

How to: Verify That Strings Are in Valid E-Mail Format

Answer 3

Thanks Konerak!!!! I changed the expression to

^(([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+)?$

and this is working for me.