in reply to Adding Email Validity Test to the existing script.
The only way to really check if an email address is valid is to send something to it.
Angel's suggestion (++) will allow you to check if the email address looks like a valid email address, but not if it actually is valid.
Update: Abigail's RFC::RFC822::Address module seems to be an alternative email validation module.
If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
That way everyone learns.
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