Mahmud, I picked up this bit of code from here on U, I think from SergeyB - VFP meister extraordinaire:

* FUNCTION ValidateEmailAddress

* address to test
tcEmailAddr = "joebob@cleveralias.com"

* use regular expression test
LOCAL loRegExp
loRegExp = CreateObject("VBScript.RegExp")
loRegExp.IgnoreCase = .T.
loRegExp.Pattern = "^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"

* is email valid?
? loRegExp.Test(tcEmailAddr)

>Hi,
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>What should one look for whilst verifying bad email addresses in a customer database of over 50,000 records - Suggestion/Sample Code would be most helpful
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>Thanks in Advance
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>Regards
>
>Mahmud Abdulla