The Forgotten Art of Email Address Verification: ASP Alliance

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The Forgotten Art of Email Address Verification

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by Joshua Finer
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3. MX Domain Level Validation

This email validation is currently the highest practical level. It is not 100% foolproof, but is a marked improvement over any lower form of validation. This level guarantees that the domain name of the email address is not only registered, but also that it is a live Internet host that can actually receive email. This is generally considered as the base practical level of email validation. This level of validation can be easily implemented via a developer component. Similar to #2, you must first install the component package on the server. After referencing the DLL, you might use code such as:

	set MXValidate = Server.CreateObject("CompanyABC.Emailvalidate")
	emailaddress = Request.Form("emailaddress")
	MXValidate.serveraddresses = "XXX.XXX.XXX.XXX","XXX.XXX.XXX.XXX" '(backup DNS)
	MXValidate.ValidateIt(emailaddress,resultcode)
	If resultcode = False Then
		Response.Redirect("badaddress.html")
	Else
		<continue form processing>
	End If

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User Comments

Title: Finding, Verifying and Correcting Bad Format email addresses
Name: GeakeIT
Date: 2010-11-22 6:55:59 AM
Comment:
I wrote a script a while ago that finds bad formats and human errors, then corrects them too.

Basically it cross references domains that have email opens recorded against them and corrects several human errors. So homail(missing character)/htomail(swapped character)/jotmail(close proximity keyboard button) are all corrected.

Details are too long to write here really so have a look at this link...

http://www.geakeit.co.uk/2010/07/30/the-ultimate-database-email-address-validatingprocessingcorrecting-script/

Title: Owsem.....
Name: chanchal
Date: 2009-10-14 5:29:21 AM
Comment:
This article could be more easier if ther is snippet.But isnt mean its bad its fine .
Rocks.........

Title: Great & Help Full
Name: Atul Khandelwal
Date: 2007-03-28 3:09:57 AM
Comment:
This is surely a good article but you could have atleast explained the last header width a snippet
this articla is really good and help full

Title: great
Name: Manmeet
Date: 2006-08-04 7:40:50 PM
Comment:
The article is really very good

Title: Good
Name: Gaurav
Date: 2006-06-10 2:36:39 AM
Comment:
This is surely a good article but you could have atleast explained the last header width a snippet

Title: thanks for the info!!
Name: BH
Date: 2006-05-07 11:00:55 AM
Comment:
thanks!

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