将IP地址添加到电子邮件验证RegEx

Question

I am using the RegEx "^[_a-zA-Z0-9-]+(\\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+[.])*(\\.[a-zA-Z]{2,17})$" to validate Email but my lead want to validate as per the Microsoft standard. SO i need to follow

http://msdn.microsoft.com/en-us/library/01escwtf(v=vs.100).aspx

In that everything working fine as per the standard but still i am facing the issues with

Valid: js#internal@proseware.com Valid: j_9@[129.126.118.1]

the above mentioned mail ID is still returning as invalid. I tried using the regex used in that page

^(?("")(""[^""]+?""@)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])@))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9]{2,17}))$ 

but i am getting the error in the server page. Though I pasted the expression inside the validation Expression it can't able to accept the characters.

Note : am using ASP.Net validators for validating the email.

Answer 1

Description

To match both of those email addresses in your sample text, I think I would rewrite your expression like this:

[A-Z0-9._%#+-]+@(?:[A-Z0-9.-]+\\.[AZ]{2,4}|\\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\])

If you're looking to use this to validate a string which may contain only an email then you can add the start/end of string anchors ^ and $ .

Example

Live Demo

Sample Text

Valid: js#internal@proseware.com Valid: j_9@[129.126.118.1]

Matches

[0][0] = js#internal@proseware.com
[1][0] = j_9@[129.126.118.1]