RE: validating email address "syntax"

["Haas, Matt" <Matt.Haas@xxxxxxxxxxxxxxxxxxx>]

Most of the e-mail validation routines I've seen look for an '@' with at least 
one '.' after it (some don't even check the '.'). The three character check 
listed would fail many valid e-mail addresses. While .com, .net, and .edu are 
very common for US e-mail addresses, many (if not most) non-US e-mail addresses 
end in .[iso country code]. For example, you may have someone@someisp.br 
(Brazil, I think) which is perfectly valid. Also, you can put an IP address in 
the address (test@127.0.0.1) which is perfectly valid but would very likely 
fail the test. I think that you'll find the spec to be pretty vague on what is 
required beyond the '@'.

Matt

-----Original Message-----
From: Douglas Handy [mailto:dhandy1@bellsouth.net]
Sent: Monday, November 11, 2002 11:11 AM
To: rpg400-l@midrange.com
Subject: Re: validating email address "syntax"


Mike,

I agree with most of your limitations, but:

>at least three characters after the '@',

Do you mean at least three characters between the @ and the period, or at least
three including the domain, period, and suffix?

While some domain registration companies insist you use at least three
characters for the domain name portion, I don't think it is a hard and fast
rule.  For instance, Road Runner's cable service is rr.com

Doug
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