RegExLib.com - The first Regular Expression Library on the Web!

Please support RegExLib Sponsors

Sponsors

Regular Expression Details

Title Test Find Pattern Title
Expression
^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$
Description
This expression matches email addresses, and checks that they are of the proper form. It checks to ensure the top level domain is between 2 and 4 characters long, but does not check the specific domain against a list (especially since there are so many of them now).
Matches
joe@aol.com | joe@wrox.co.uk | joe@domain.info
Non-Matches
a@b | notanemail | joe@@.
Author Rating: Not yet rated. Steven Smith
Source
Your Rating
Bad Good

Enter New Comment

Title
 
Name
 
Comment
 
Spammers suck - we apologize. Please enter the text shown below to enable your comment (not case sensitive - try as many times as you need to if the first ones are too hard):

Existing User Comments

Title: special character in domain name
Name: zikwag
Date: 7/17/2009 2:45:41 PM
Comment:
how can i modify this regex so that the address xyz@its.j&j.com bypass validation rules


Title: special character in domain name
Name: zikwag
Date: 7/17/2009 2:06:30 PM
Comment:
how can i modify this regex so that the address xyz@its.j&j.com bypass validation rules


Title: Further refined
Name: cottsak
Date: 1/4/2007 11:09:29 PM
Comment:
the following is modded further from the comments on this page. it additionally: - does not allow underscore in the domain name - does not allow hyphen at start or end of domain name (sub-domains included) also, i have expand the \w change so that it's explicit, irrespective of engine flavour the only other thing i didn’t factor (that i could think of) was minimal number of characters for a domain. generally this is >= 2 but for sub-domains it may be 1 so i left it. it would also make the expression a lot more complicated. ^[-a-zA-Z_0-9.]+@([a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9]|[a-zA-Z0-9])?.)+[a-zA-Z]{2,4}$


Title: \. inside a character class does not mean .
Name: Udo Güngerich
Date: 8/14/2006 2:42:10 AM
Comment:
Inside character classes . does not have a special meaning, so you do not need to escape it! Regards, Udo P.S.: [[:alnum:]_-\.] must of course be [-[:alnum:]_\.] else the dash tries to be a range and fails ;)


Title: [\w] is not a character class according to Perl 5.8.6
Name: Udo Güngerich
Date: 8/14/2006 2:37:23 AM
Comment:
So [\w-\.] is probably better written as [[:alnum:]_-\.] (with POSIX character classes) Regards, Udo


Title: little improvement
Name: Jocker
Date: 7/10/2006 11:25:32 AM
Comment:
^[\w-\.]+@(?:[\w-]+\.)+[a-zA-Z]{2,4}$ a slightly better version: this one does not capture part of the domain, does not allow numbers in the regional code


Title: Incompatible with internet standards
Name: Josh Jore
Date: 2/23/2004 11:34:04 AM
Comment:
The expression does not account for whitespace or quoting in the mailbox portion of the address and neglects to handle quoted domains.


Title: FLANTUS
Name: SGSGS
Date: 1/22/2004 5:14:13 PM
Comment:
THANKS A LOT! EXELLENT SITE ESPECIALLY TO THE STARTERS. IT IS ALSO GREAT FOR LOOKUP. THANKS


Copyright © 2001-2014, RegexAdvice.com | ASP.NET Tutorials