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Re: Email Vali8dation Problem

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From "Mel Smith" <med_cutout_syntel@aol.com>
Newsgroups comp.lang.javascript
Subject Re: Email Vali8dation Problem
Date Fri, 25 Jan 2013 09:37:42 -0700
Lines 36
Message-ID <amfqn3Fj7guU1@mid.individual.net> (permalink)
References <amb6f9Fhvk3U1@mid.individual.net> <JqhEReJ0KZARFws0@invalid.uk.co.demon.merlyn.invalid>
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Cancel-Lock sha1:znvd54Zk1tXxRqUQTWSSVAdUJGw=
X-Priority 3
X-MSMail-Priority Normal
X-Newsreader Microsoft Outlook Express 6.00.2900.5931
X-MimeOLE Produced By Microsoft MimeOLE V6.00.2900.6157
X-RFC2646 Format=Flowed; Original
Xref csiph.com comp.lang.javascript:18250

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Dr JR said


> There is little point in trying to validate the format of an E-address
> (except for those writing E-mail software) when there is no possibility
> of writing code that will report
>        reply1300@merlyn.demon.co.uk    as good and
>        reply1300@merlyn.denom.co.uk    as probably no good
>
> Of those, the first should, IIRC, apparently be delivered, but will
> bounce after 30 days (unless in the meanwhile I change what that address
> does), while the second is to an address which (at this instant) does
> not exist.
>
> Also, if you "validate" against what you apparently think the format
> should be, you will reject valid (admittedly uncommon) types of address
> [e.g. designed to work, but not to be believed by address harvesters].
> Before attempting a validator, you should find, read, and understand the
> latest applicable RFC for E-addresses.
>
> It should be useful, though, to check that the string provided might
> possibly an E-address - users sometimes may get their field order wrong
> and insert their snail-mail address or telephone number instead.
>
> A valid address will contain at least one character, followed by @,
> followed by at least one character, followed by a dot, and ending with
> at least two alphabetic characters (though the RFC itself may be more
> (or less) lenient) - and it will not end in ".invalid" or, IIRC & in
> practice, "example.com".


This is discouraging :(

-Mel

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Thread

Email Vali8dation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-23 15:27 -0700
  Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 01:18 +0100
    Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 02:06 +0100
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 22:30 +0100
        Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 22:38 +0100
    Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-24 13:04 +1100
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 22:24 +0100
        Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 22:40 +0100
        Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 00:12 +1100
          Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-25 21:56 +0100
            Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 10:56 +1100
              Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 01:56 +0100
                Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 20:14 +1100
                Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 13:21 +0100
                Re: Email Vali8dation Problem Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2013-01-26 15:07 +0200
                Re: Email Vali8dation Problem "Jukka K. Korpela" <jkorpela@cs.tut.fi> - 2013-01-26 16:04 +0200
                Re: Email Vali8dation Problem Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2013-01-26 16:37 +0200
                Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 15:46 +0100
                Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-27 10:30 +1100
  Re: Email Vali8dation Problem Andreas Bergmaier <andber93@web.de> - 2013-01-24 01:58 +0100
    Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 02:08 +0100
    Re: Email Vali8dation Problem "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-01-24 10:25 +0100
  Re: Email Vali8dation Problem Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2013-01-24 11:15 +0100
    Re: Email Validation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-24 08:53 -0700
      Re: Email Validation Problem Luc Yen <luc@goal.tw> - 2013-01-25 13:53 -0800
  Re: Email Vali8dation Problem Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-01-24 19:59 +0000
    Re: Email Vali8dation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-25 09:37 -0700
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-25 22:08 +0100
        Re: Email Vali8dation Problem Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-01-26 20:51 +0000

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