RE: Message-ID Header - is it essential for proper email flow?

  • From: "John Tolmachoff \(Lists\)" <johnlist@xxxxxxxxxxxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 9 Sep 2004 14:13:30 -0700

It is indeed required by RFC.

Yes, Outlook 2003 removed it. That has caused problems.

Invalid/missing Message-ID is/can be used as part of spam weighting.

John Tolmachoff
Engineer/Consultant/Owner
eServices For You


> -----Original Message-----
> From: Danny [mailto:nocmonkey@xxxxxxxxx]
> Sent: Thursday, September 09, 2004 1:54 PM
> To: [ExchangeList]
> Subject: [exchangelist] RE: Message-ID Header - is it essential for proper
email flow?
> 
> http://www.MSExchange.org/
> 
> On Thu, 9 Sep 2004 16:43:07 -0400, Michael B. Smith <michael@xxxxxxxxxx>
> wrote:
> > http://www.MSExchange.org/
> >
> > According to email RFC's, Message-ID is a required header.
> 
> Apparently, Outlook 2003 removed it:
> 
> http://extelligence.ringlet.net/roam/archives/000018.html
> 
> Although, if you have Exchange, I think it ends up adding the Message-ID.
> 
> > It's also used for grouping by conversation (Outlook term).
> 
> I wonder what happens for those without Exchange and have Outlook 2003
> - I assume there would be no Message-ID.
> 
> > I wouldn't remove it.
> 
> Not a big deal to me. It's just extra information that external
> networks/eyes do not need to see, in my opinion.
> 
> ...D
> 
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