RE: email/SMTP validation

Tim,

I'm sure you will get plenty of suggestions about methods or software to accomplish this. The issues you may run into are recipient server security levels which will render these methods useless. Most external SMTP commands can be restricted by the mail server administrator, especially those that aid spammers. Before exploring the plethora of options, I would weigh the benefits against the possible issues that could arise. If your plans are to reject email addresses that can not be authenticated, it may hinder your goals. Also keep in mind that a valid address does not constitute a valid recipient. If your recipient's mailbox is full, for example, authenticating the address will not guarantee delivery.

Have you considered a DNS lookup alternative? Rather than relying on the SMTP server for a response, you could lookup the DNS record for the domain to determine if there is a valid MX (Mail Exchange) entry. If either lookup fails, you'll know that the domain is invalid for mail delivery.

Tom Armbruster


________________________________

From: rpg400-l-bounces@xxxxxxxxxxxx on behalf of tim
Sent: Fri 1/11/2008 7:24 AM
To: 'RPG programming on the AS400 / iSeries'
Subject: email/SMTP validation



I am interested in validating an email address. No just the syntax but if
it's a valid email address. I've heard that that's called "smtp validation".




Has anyone done this who can give some suggestions?



Thanks

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