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Re: Add "Received:" header to email msg in correct position?

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Date Tue, 06 May 2014 18:11:48 +0300
From Burak Arslan <burak.arslan@arskom.com.tr>
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Subject Re: Add "Received:" header to email msg in correct position?
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On 05/06/14 12:47, Chris Angelico wrote:
> On Tue, May 6, 2014 at 7:15 PM, alister
> <alister.nospam.ware@ntlworld.com> wrote:
>> On Mon, 05 May 2014 19:51:15 +0000, Grant Edwards wrote:
>>
>>> I'm working on a Python app that receives an e-mail message via SMTP,
>>> does some trivial processing on it, and forwards it to another SMTP
>>> server.
>>>
>>> I'd like to do the polite thing and add a "Received:" header, but I
>>> can't figure out how to get Python's email module to add it in the
>>> correct place.  It always ends up at the "bottom" of the headers below
>>> From: To: etc.  It's supposed to go at the above all the Received:
>>> headers that where there when I received it.
>> Is this required or just being polite?
>> what I mean is does the standard state the headers must be in a
>> particular order or can they appear anywhere, you may be spending time
>> trying to resolve an issue that does not need fixing.
> Yes, it's required. RFC 2821 [1] section 3.8.2 says "prepend".
>
>

The rationale for "prepend" is to make it possible for MTAs to add their
"Received:" headers to messages without having to parse them.

So you're supposed to do the same: Just write your Received header,
followed by '\r\n', followed by the rest of the message to the socket
and you should be fine.

Best,
Burak

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Thread

Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-05 19:51 +0000
  Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-05 13:01 -0700
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-05 20:58 +0000
      Re: Add "Received:" header to email msg in correct position? Tim Chase <python.list@tim.thechases.com> - 2014-05-05 16:09 -0500
        Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 02:13 +0000
          Re: Add "Received:" header to email msg in correct position? Steven D'Aprano <steve@pearwood.info> - 2014-05-06 08:22 +0000
            Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:12 +0000
      Re: Add "Received:" header to email msg in correct position? Terry Reedy <tjreedy@udel.edu> - 2014-05-06 14:16 -0400
      Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-07 10:13 +1000
  Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 09:15 +0000
    Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-06 19:47 +1000
      Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 10:26 +0000
        Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-06 20:41 +1000
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:15 +0000
      Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:19 +0000
      Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-07 00:26 +1000
      Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 15:16 +0000
    Re: Add "Received:" header to email msg in correct position? Burak Arslan <burak.arslan@arskom.com.tr> - 2014-05-06 18:11 +0300
      Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 15:26 +0000
        Re: Add "Received:" header to email msg in correct position? Burak Arslan <burak.arslan@arskom.com.tr> - 2014-05-07 18:06 +0300
        Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-08 01:11 +1000
        Re: Add "Received:" header to email msg in correct position? Ian Kelly <ian.g.kelly@gmail.com> - 2014-05-07 16:29 -0600
          Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-08 13:28 +0000
            Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-08 23:47 +1000
            Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-08 06:46 -0700
            Re: Add "Received:" header to email msg in correct position? Skip Montanaro <skip@pobox.com> - 2014-05-08 09:50 -0500
              Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-08 18:39 +0000
                Re: Add "Received:" header to email msg in correct position? Tim Chase <python.list@tim.thechases.com> - 2014-05-08 13:48 -0500
                Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-09 14:28 +0000
                Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-08 17:00 -0700
  Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-07 08:58 +0200
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-07 14:32 +0000
      Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-08 09:44 +0200
  Re: Add "Received:" header to email msg in correct position? Emre Hasegeli <emre@hasegeli.com> - 2014-05-07 11:11 +0300
  Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-07 10:57 +0200
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-07 14:33 +0000

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