RE: E-Mail Address in WEB Browser.

• To: patw@aqmd.gov, www-security@ns2.rutgers.edu
• Subject: RE: E-Mail Address in WEB Browser.
• From: Jonathon Tidswell <t-jont@microsoft.com>
• Date: Thu, 14 Dec 95 15:59:32 TZ

Message-ID: syd-02-msg951214060408MTP[01.51.00]000001a0-3968


| From:  <patw@aqmd.gov>
||
| Can anyone tell me or is there any write up on the issue of verifying the
| E-Mail address that is entered into the WEB Browser.
|

You can use the RFC 822 specification to test whether the overall 
formatting of an address is correct.
However lots of machines are connected via indirect links or are behind 
firewalls.
In general these indirect links and firewalls accept mail in the 
correct format and only report problems at the time they try to deliver 
the mail - ie they do not return useful information to the VRFY and 
EXPN commands in SMTP.

You could of course send a test message with return-receipt enabled and 
hope the destination machine honours return-receipt properly, that the 
delays of the extra message and reply are acceptable and that users 
dont mind getting lots of test messages.

Of course you could just treat it like snail mail, send it and wait 
until the postmaster returns it with an error. :-)

- Jon Tidswell
Disclaimer: I think my thoughts are my own, and I believe my writings 
are too.

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