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  2. WEB400
  3. January 2006

Re: DNS Lookups

web400@xxxxxxxxxxxxxxxx wrote:
> I'm not sure that it matters if all you're doing is checking to see if an 
> e-mail domain is valid -- if any of them is good, it's valid.  If you have 
> to actually deliver the mail, of course, is where my bad memory would 
> become important... :)

Checking for the MX is only important if you are going to actually
deliver the message.  Checking for the A or CNAME record should be
sufficient to check to see if a domain is valid or not.

david

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