Email Regular expression

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February 26th, 2009, 11:09 AM

dingi21

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Email Regular expression

Hi All,

I am using following regular expression to validate email addresses but somehow it is not validating emails for hyphen or dashes (-).

this email is not valid with following regex: email-email @ email .gov (put spaces as forum blocks email addresses.)

var emailpattern=new RegExp("^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(\\.[_A-Za-z0-9-]+)");

Any idea what am i missing even when included hyphen.

Any help would be really appreciated.

February 26th, 2009, 11:37 AM

ChiefWigs1982

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You may be implementing this with JS, but it's more of a general RegEx
question, I think.

I've moved it to the RegEx forum where it should get some attention.

If you have trouble implementing the final solution in your JS, just pop
back into the JS forum and someone should be able to help.

--Jon.

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February 26th, 2009, 11:38 AM

ChiefWigs1982

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You might also find that if you search this forum, someone might have
had a similar problem and posted a solution.

February 26th, 2009, 04:04 PM

ManiacDan

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Try this expression on for size:

Code:

^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$

Also, that expression you posted DID match email-email@email.gov for me in PHP. No edits aside from the escapes on your backslashes. Are you sure you're doing them right?

-Dan

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February 26th, 2009, 06:08 PM

fishtoprecords

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Just a warning, the real parsing of email addresses, as specified by RFC822, is really ugly. While its probably possible to do it all with a regex, I've never seen one that is perfect.

But a quick search will get one that is good enough for real world use.

February 26th, 2009, 06:35 PM

Scorpions4ever

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There is a regular expression to validate any RFC 822 compliant address, but the actual expression is over 1 page long and is mind-bogglingly complex.
http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html

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February 26th, 2009, 06:57 PM

fishtoprecords

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Quote:

Originally Posted by Scorpions4ever

There is a regular expression to validate any RFC 822 compliant address, but the actual expression is over 1 page long and is mind-bogglingly complex.

I didn't know it existed. Thanks.

I can believe on the mind-boggling part

March 2nd, 2009, 04:48 PM

Kravvitz

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Being able to use "+" in my addresses for the purpose sorting messages is useful for me. (Some people call it "plus addressing".) Unfortunately many sites don't allow addresses like that.

Code:

^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(\+[-.\w]*[0-9a-zA-Z])?@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$

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Email Regular expression

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