RE: Message-ID Header - is it essential for proper email flow?
- From: Danny <nocmonkey@xxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Thu, 9 Sep 2004 17:47:58 -0400
On Thu, 9 Sep 2004 14:13:30 -0700, John Tolmachoff (Lists)
<johnlist@xxxxxxxxxxxxxxxxxxx> wrote:
> http://www.MSExchange.org/
>
> It is indeed required by RFC.
From the RFC - http://www.faqs.org/rfc/rfc2822.txt:
message-id 0* 1 SHOULD be present - see 3.6.4
It's not required.
> Yes, Outlook 2003 removed it. That has caused problems.
>
> Invalid/missing Message-ID is/can be used as part of spam weighting.
Kind of a grey area here.
...D
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