check if the email address is valid

[Shao Zhang <shao@cia.com.au>]

Hi,
	I need to write a program to check if a given email address is
	valid. I cannot simply send a message to the email address and
	waiting for a bounce.

	The only way I can think is to telnet to the mail server on port
	25 and do a VFRY command. However, some mail servers are
	configured not to allow such command.

	Is there any other way to do this??

	Thanks in advance.

Shao.

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Shao Zhang - Running Debian 2.1  ___ _               _____
Department of Communications    / __| |_  __ _ ___  |_  / |_  __ _ _ _  __ _ 
University of New South Wales   \__ \ ' \/ _` / _ \  / /| ' \/ _` | ' \/ _` |
Sydney, Australia               |___/_||_\__,_\___/ /___|_||_\__,_|_||_\__, |
Email: shao@cia.com.au                                                  |___/ 
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