"Itamar S.-T." wrote:

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ScherBi@BAM.com wrote:

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This may be heresy to some folk, but you're probably better off doing this client side, if you are able. The Javascript in Version 4.x and above Netscape (and IE too, I think) has

a

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regular expression engine built in. An re to match all possible valid email addrs could be quite large however: http://enterprise.ic.gc.ca/~jfriedl/regex/email-opt.txt

Or an External Method that verifies against the correct SMTP server that the email exists . An amazing amount of our gretting cards bounce due to bad email addresses. Forget this...the most SMTP-Servers did not allow the VRFY-Command anymore, because of security reasons.

Or those of us running more "enlightened" mail systems (like Postfix), there's no way for the program answering the SMTP port to know this information. I'd say the following would be an acceptable validation: * Verify that it has an '@' in it (! and % are VERY rare any more) * Verify that the TLD is valid (this requires a listing of all ISO country codes, plus org,net,com,int) This at least makes sure that it's somewhat "well formed" and captures 99% of the cases correctly. Chris -- | Christopher Petrilli Python Powered Digital Creations, Inc. | petrilli@digicool.com http://www.digicool.com