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

Please support RegExLib Sponsors

Sponsors

Regular Expression Details

Title Test Find RFC2822 Compliant Email Address
Expression
^(?i:(?<local_part>[a-z0-9!#$%^&*{}'`+=-_|/?]+(?:\.[a-z0-9!#$%^&*{}'`+=-_|/?]+)*)@(?<labels>[a-z0-9]+\z?.*[a-z0-9-_]+)*(?<tld>\.[a-z0-9]{2,}))$
Description
RFC2822 compliant. Includes all special characters, except for allowance of quoted local-part. Also disallows '.' (period) to be at the front or end of local-part, or occurr more than once consecutively. It does allow for optional infinite number of sub-domains. The following standards are not enforced, due to RegExp limitations (unable to check for group string length): As per RFC2821 the local-part may have a maximum length of 64 characters, while the domain name may have a maximum length of 255 characters. Each domain label must be between 1 and 63 characters long, while the total length of the domain name may not exceed 255 characters.
Matches
my.sub.test.server@sub.host.server.uk.co
Non-Matches
.stubs@com|.me@server.com|my..name@server.com
Author Rating: The rating for this expression. Mike Bronner
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: Missing some escapes
Name: Neal Blomfield
Date: 4/28/2010 6:30:58 PM
Comment:
Great regex, just missing a couple of escapes - the - in the character class in the local part needs to be escaped and the . after the \z? needs to be escaped. ^(?i:(?<local_part>[a-z0-9!#$%^&*{}'`+=\-_|/?]+(?:\.[a-z0-9!#$%^&*{}'`+=\-_|/?]+)*)@(?<labels>[a-z0-9]+\z?\.*[a-z0-9-_]+)*(?<tld>\.[a-z0-9]{2,}))$


Copyright © 2001-2018, RegexAdvice.com | ASP.NET Tutorials