-----Original Message-----
>From: [EMAIL PROTECTED]
>Sent: Jan 30, 2008 4:58 AM
>To: beginners@perl.org
>Subject: Re: How to read an rfc spec
>
>On Jan 28, 2:27 pm, [EMAIL PROTECTED] wrote:
>> Hi everyone
>> It cost nothing to be polite and only a few seconds to be helpful. I was
>> myself looking at RFC822 a few days ago to try to figure out what headers
>> should be in an
>> email message I bounce with my Perl re-wtite script from a procmail recipe.
>> Secret formats and being generally unhelpful are a M$ trait, not to be 
>> cloned.
>> --
>> Andrew in Edinburgh,Scotland.
>And to close the issue.
>
>Was looking for info on the email RFC too and ran into this.
>
>http://www.regular-expressions.info/email.html
>
>and the "final" word on the matter.   Do read what he has to say but
>here is the monster regx
>
>$emailx = qr((?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?
>^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\
>[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?
>\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?
>[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-
>z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-
>\x09\x0b\x0c\x0e-\x7f])+)\]));
>


This RE is not perfect as it was said on this list.
You may use a module from CPAN instead:

http://search.cpan.org/~rjbs/Email-Valid-0.179/lib/Email/Valid.pm

EXAMPLES ^

Let's see if the address '[EMAIL PROTECTED]' conforms to the RFC822 
specification:

  print (Email::Valid->address('[EMAIL PROTECTED]') ? 'yes' : 'no');

--
Jeff Pang - [EMAIL PROTECTED]
http://home.arcor.de/jeffpang/

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