Validating EMailAdresses for syntactical correctness

Alexander Skwar ASkwar at
Sun Jan 27 02:06:26 CET 2002

So sprach »Mark McEahern« am 2002-01-24 um 10:26:36 -0800 :
> Level 5:  Make sure the address itself is valid (resolve the mx record and
> test the address via smtp).

This won't work.  A lot of the huge providers (AOL, T-Online...) always
give a true result here, even if the adress does not exist.  This is
also done for anti-spam measures, because if a spammer could so easily
check if a given adress exists, it would help him.

Alexander Skwar
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