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Groups > comp.os.linux.misc > #11177

Re: testing email deliverability...

From "AvdB" <nomail@example.invalid>
Newsgroups comp.os.linux.misc, comp.lang.php
Subject Re: testing email deliverability...
Date 2014-06-05 12:59 +0200
Organization Aioe.org NNTP Server
Message-ID <lmpihj$461$1@speranza.aioe.org> (permalink)
References <lmoeok$5v6$1@news.albasani.net>

Cross-posted to 2 groups.

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"The Natural Philosopher" <tnp@invalid.invalid> schreef in bericht 
news:lmoeok$5v6$1@news.albasani.net...
> what I want is a function like
>
> is_valid_mail("user12345@gmail.com")
>
> that will return true or false if gmail accepts the user as known (yes the 
> spam is always @gmail.com) WITHOUT having to write a dns mx lookup, then 
> connect to socket 25 and etc etc etc..
>
> exim -bt tells me if the domain is valid, but not the user.
>
> I am not particular how its achieved - anything can be merged into the 
> existing code.

As an idea to work on:

is_valid_mail() checks your database for known users.
If unknown, display a 'verify first' page.
Present a unique code which the user has to mail back to you.
Still not 100% save, but if a user can send using a certain address, there's 
reason to believe he can receive as well. Add the user to your database.

Not enough?
Make it a three way handshake.
The user mails you his code, your autoresponder sends (after verifying the 
code, obviously) another unique code.
Your form checks { is_valid_mail() or presents_valid_code() }
You now have proof email traffic is possible in both directions.

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Thread

testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-05 01:48 +0100
  Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-04 18:40 -0700
    Re: testing email deliverability... Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-05 02:05 +0000
      Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-04 19:17 -0700
    Re: testing email deliverability... Rahul <nospam@invalid.invalid> - 2014-06-05 07:11 +0000
    Re: testing email deliverability... Rahul <nospam@invalid.invalid> - 2014-06-05 11:08 +0000
      Re: testing email deliverability... Marc Haber <mh+usenetspam1118@zugschl.us> - 2014-06-14 11:53 +0200
        Re: testing email deliverability... Rahul <nospam@invalid.invalid> - 2014-06-14 18:34 +0000
          Re: testing email deliverability... Marc Haber <mh+usenetspam1118@zugschl.us> - 2014-06-15 08:54 +0200
  Re: testing email deliverability... "Tony Marston" <TonyMarston@hotmail.com> - 2014-06-05 03:47 +0100
    Re: testing email deliverability... Eli the Bearded <*@eli.users.panix.com> - 2014-06-05 04:53 +0000
      Re: testing email deliverability... Richard Kettlewell <rjk@greenend.org.uk> - 2014-06-05 09:13 +0100
        Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-05 08:05 -0700
          Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-05 16:21 +0100
          Re: testing email deliverability... Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-05 11:27 -0400
          Re: testing email deliverability... Mike McGinn <mikemcginn@mcginnweb.net> - 2014-06-05 16:31 +0000
            Re: testing email deliverability... "Peter J. Holzer" <hjp-usenet3@hjp.at> - 2014-06-05 21:15 +0200
      Re: testing email deliverability... Arno Welzel <usenet@arnowelzel.de> - 2014-06-09 11:30 +0200
        Re: testing email deliverability... Eli the Bearded <*@eli.users.panix.com> - 2014-06-09 23:08 +0000
          Re: testing email deliverability... Arno Welzel <usenet@arnowelzel.de> - 2014-06-10 11:08 +0200
  Re: testing email deliverability... Sam <sam@email-scan.com> - 2014-06-04 22:04 -0500
    Re: testing email deliverability... Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-04 23:27 -0400
    Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-05 05:37 +0100
      Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-04 21:55 -0700
        Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-05 06:17 +0100
      Re: testing email deliverability... Chuck Anderson <cycletourist@invalid.invalid> - 2014-06-05 21:36 -0600
        Re: testing email deliverability... Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-06 09:41 -0400
          Re: testing email deliverability... Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-06 14:37 +0000
            Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-06 16:46 +0100
              Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-06 10:39 -0700
                Re: testing email deliverability... Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-06 14:22 -0400
                Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-06 20:54 +0100
                Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-06 13:22 -0700
                Re: testing email deliverability... Eli the Bearded <*@eli.users.panix.com> - 2014-06-06 21:55 +0000
                Re: testing email deliverability... Chris Davies <chris-usenet@roaima.co.uk> - 2014-06-09 13:56 +0100
                Re: testing email deliverability... Marc Haber <mh+usenetspam1118@zugschl.us> - 2014-06-14 11:55 +0200
  Re: testing email deliverability... Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-04 23:05 -0400
  Re: testing email deliverability... "AvdB" <nomail@example.invalid> - 2014-06-05 12:59 +0200
    Re: testing email deliverability... The Natural Philosopher <tnp@invalid.invalid> - 2014-06-05 13:51 +0100
  Re: testing email deliverability... Adrienne Boswell <arbpen@yahoo.com> - 2014-06-05 18:39 +0000
    Re: testing email deliverability... Eli the Bearded <*@eli.users.panix.com> - 2014-06-05 20:46 +0000
      Re: testing email deliverability... Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-06-05 14:41 -0700
        Re: testing email deliverability... Eli the Bearded <*@eli.users.panix.com> - 2014-06-06 22:26 +0000
      Re: testing email deliverability... Adrienne Boswell <arbpen@yahoo.com> - 2014-06-05 22:21 +0000
  Re: testing email deliverability... James Moe <jimoeDESPAM@sohnen-moe.com> - 2014-06-05 13:14 -0700
  Re: testing email deliverability... Arno Welzel <usenet@arnowelzel.de> - 2014-06-06 14:11 +0200
  Re: testing email deliverability... Chris Davies <chris-usenet@roaima.co.uk> - 2014-06-09 13:53 +0100
  Re: testing email deliverability... don.schueler@gmail.com - 2014-07-18 03:45 -0700

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