Regular expression for multiple email addresses

Question

I am working to validate a string of email addresses. This pattern works fine if there is only one email address:

var pattern = /^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$/;

But if I have two email addresses separated by space or by a newline, then it does not validate. For example:

[email protected] [email protected]

or

[email protected] 
[email protected]

Can you please tell me what would be a way to do it? I am new to regular expressions.

Help much appreciated! Thanks.

Your regex is very wrong. http://stackoverflow.com/a/1903368/34397 — SLaks, Jun 04 '13 at 14:18

score 2 · Answer 1 · edited Feb 08 '17 at 14:41

2

Try this RegEx

/^\s*(?:\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}\b\s*)+$/

Regular expression image

In the above image, everything inside Group 1 is what you already had. I have added a word ending and spaces.

It will match "[email protected]", " [email protected] ", "[email protected] [email protected]" and email addresses in multiple lines also.

Update

I got the RegEx for Email from http://www.regular-expressions.info/email.html and I have used it in my expression. You can find it below:

/^\s*(?:([A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4})\b\s*)+$/i

Regular expression image

edited Feb 08 '17 at 14:41

Community

1
1

answered Jun 04 '13 at 15:37

ManojRK

952
9
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What about `[email protected]` – user1937198 Jun 04 '13 at 16:49
@user1937198: Like I said I have used the email regex given by OP. But I have now updated it with an expression for any email address. – ManojRK Jun 04 '13 at 17:25
your still missing .museum, internationalized domains and addresses, Quoted local parts, IP hosts and comments, though a valid email regex is hard. – user1937198 Jun 04 '13 at 19:44

score 1 · Answer 2 · answered Jun 04 '13 at 14:19

Change the ^ and $ anchors to word boundaries, \b.

/\b\w+...{2,3}\b/

You should also note that the actual specification for email addresses is extremely complicated and there are many emails that will fail this test -- for example those with multiple periods in the domain. May be okay for your purposes, but just pointing it out.

score 0 · Answer 3 · answered Jun 04 '13 at 14:18

try this

function validateEmail(field) {
var regex=/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i;
return (regex.test(field)) ? true : false;
}

function validateMultipleEmailsCommaSeparated(value) {
var result = value.split(" ");
for(var i = 0;i < result.length;i++)
if(!validateEmail(result[i])) 
        return false;           
return true;
}

Jake Toronto · Answer 4 · 2014-09-18T15:45:53.150

You might consider simply splitting the whole string into an actual array of email addresses, instead of trying to validate the entire thing at once. This has the advantage of allowing you to point out in your validation message which address failed. uld look like this:

  var emailRegex = /^[A-Z0-9._%+-]+@(?:[A-Z0-9-]+\.)+[A-Z]{2,4}$/i; // http://www.regular-expressions.info/email.html
  var split = form.emails.value.split(/[\s;,]+/); // split on any combination of whitespace, comma, or semi-colon

  for(i in split)
  {
     email = split[i];
     if(!emailRegex.test(email))
     {
          errMsg += "The to e-mail address ("+email+") is invalid.\n";           
     }
  }

score 0 · Answer 5 · edited Apr 24 '15 at 12:33

0

Your best regular expression for multiple emails accepts all special characters

(-*/+;.,<>}{[]||+_!@#$%^&*())

edited Apr 24 '15 at 12:33

Michael Irigoyen

22,513
17
89
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answered Apr 24 '15 at 12:06

Aryan

1
4

score -2 · Answer 6 · answered Jul 21 '14 at 08:53

-2

Best Regular Expression for multiple emails

/^([A-Z0-9.%+-]+@[A-Z0-9.-]+.[A-Z]{2,6})*([,;][\s]*([A-Z0-9.%+-]+@[A-Z0-9.-]+.[A-Z]{2,6}))*$/i

answered Jul 21 '14 at 08:53

shrikant_phale

1

Regular expression for multiple email addresses

6 Answers6