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E-Mail Validator

By Sean Smith,

Simply pass a field which contains an e-mail address to the function and either a 1 (valid) or 0 (invalid) will be returned as output.

This routine is not meant to be an all-encompassing solution for identifying invalid e-mail addresses, but rather a quick / easy check routine to catch obvious errors and mistakes.

Examples of how to run the function:

dbo.ufn_E_Mail_Validator ('') AS is_valid_yes
,dbo.ufn_E_Mail_Validator ('') AS is_valid_no

Or... against a table, returning only invalid e-mail addresses (NULL values are considered valid by the function as they are essentially "unknown"):

,dbo.ufn_E_Mail_Validator (CC.e_mail) AS is_valid
dbo.company_contact CC
dbo.ufn_E_Mail_Validator (CC.e_mail) = 0

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