in reply to Email Validation
Email::Valid is probably your best bet - any of the less rigourous methods proposed are simply biding time until they fail to validate an otherwise perfectly functional address.
Email addresses are suprisingly complicated beasties - Mastering Regular Expressions has a regex to match valid addresses which will curl your hair - you can find it here.
But in any case, you need to deal with failure notices - any mail, even mail to valid addresses, can fail to deliver for a variety of reasons.
Peace,
-McD
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