On 05/06/14 12:47, Chris Angelico wrote: > On Tue, May 6, 2014 at 7:15 PM, alister > <alister.nospam.w...@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 -- https://mail.python.org/mailman/listinfo/python-list
