MVC3 regular expression for email

Question

I am using the follwoing regular expression for email validation

@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"

Bit it accepts [][email protected][][] as a valid email.whats the pattern i should use? Is it possible to check that at client side?

I Knew How To Validate An Email Address Until I Read The RFC — Habib
– Habib, Commented Jan 24, 2013 at 9:26
Did you try to search a little on the subject before posting your question? — Yannick Blondeau
– Yannick Blondeau, Commented Jan 24, 2013 at 9:27
Dear @YannickBlondeau I tried a lot but when i entered before or later valid email address it accepts as a valid email — Amol
– Amol, Commented Jan 24, 2013 at 9:30
@Amol, I meant searching on StackOverflow to see if your question has already been answered... — Yannick Blondeau
– Yannick Blondeau, Commented Jan 24, 2013 at 9:50

Community · Accepted Answer · 2017-05-23 12:21:21Z

2

If you want to validate an Email Address Regex is not the right choice.

Use MailAddress as recommended by SLaks

try 
{
   address = new MailAddress(address).Address;
   //address is valid here
} 
catch(FormatException) 
{
   //address is invalid
}

But if you are addicted to regex..just do this

.*@.*

edited May 23, 2017 at 12:21

CommunityBot

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answered Jan 24, 2013 at 9:30

Anirudha

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2 Comments

Amol Over a year ago

Hello, is it possible to check at client side?

Anirudha Over a year ago

@Amol not possible since there are many corner cases where the regex would fail..you can try .*@.* at client side and then check it through MailAddress at server side..

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