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Re: PHPMailer from and mesg-id bug

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Rob van der Putten wrote:

> Thomas 'PointedEars' Lahn wrote:
>> There could be a rule with your MTA not to reject messages with your From
>> header field value or FQDN as used by your MTA as those could be deemed
>> trustworthy.
> 
> FQDN yes, header from no. The latter is easily faked. It's just
> something you fill out in your email client config.

I am aware of that.
 
>> Yes, there is.
> 
> How do you fake a FQDN. It's based on IP address (reverse lookup).

The “Message-Id” header field value can, in practice, be anything, and can 
be as easily faked as the “From” header field value.  Sometimes it does not 
even contain a FQDN, just some domain-part.

If you wish to further discuss the Internet Message Format, SMTP, and 
UCE/UBE, I suggest you do that in the appropriate newsgroup.  This newsgroup 
is about PHP.


PointedEars
-- 
var bugRiddenCrashPronePieceOfJunk = (
    navigator.userAgent.indexOf('MSIE 5') != -1
    && navigator.userAgent.indexOf('Mac') != -1
)  // Plone, register_function.js:16

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PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-12 17:41 +0200
  Re: PHPMailer from and mesg-id bug Michael Vilain <vilain@NOspamcop.net> - 2013-07-12 09:13 -0700
    Re: PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-12 20:57 +0200
      Re: PHPMailer from and mesg-id bug The Natural Philosopher <tnp@invalid.invalid> - 2013-07-12 21:28 +0100
        Re: PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-14 10:21 +0200
      Re: PHPMailer from and mesg-id bug Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-12 17:06 -0400
      Re: PHPMailer from and mesg-id bug Christoph Michael Becker <cmbecker69@arcor.de> - 2013-07-13 00:21 +0200
        Re: PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-14 10:36 +0200
      Re: PHPMailer from and mesg-id bug Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-07-13 01:35 +0200
        Re: PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-14 10:18 +0200
          Re: PHPMailer from and mesg-id bug Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-07-14 10:50 +0200
            Re: PHPMailer from and mesg-id bug Rob van der Putten <rob@sput.nl> - 2013-07-14 11:46 +0200
              Re: PHPMailer from and mesg-id bug Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-07-14 11:54 +0200
      Re: PHPMailer from and mesg-id bug Twayne <nobody@spamcop.net> - 2013-07-13 19:53 -0400
  Re: PHPMailer from and mesg-id bug "Alex vdB" <alex@invalid> - 2013-07-14 11:47 +0200

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