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Does Email Header MessageID change on Resend? RRS feed

  • Question

  • Hi,

     

    I was hoping someone could help me answer this. 

     

    Description:

    We have made an update to our MX record as part of a migration, but had to roll the changes back. The following day our users were not receiving their emails and we notice our AV/AS was accepting those mail, but not routing those messages to the proper mailbox. Luckily we archive any inbound messages first so we inform the users to perform a restore on those missing emails since we were not able to locate the actual received mail.

     

    Question:

     

    If a restored/resend of messages are performed would the messageID on the header change?

     

    I have performed this myself and can confirm the messageID changes, but I would like to know why is there a need for the messageID to change?

     

    thanks! 

     

     

    Monday, November 7, 2011 8:09 PM

Answers

  • Sembee, 

     

    Thanks for your reply. Do you know if there are articles out there for this? 


    http://tools.ietf.org/html/rfc5322

     

    The "Message-ID:" field provides a unique message identifier that
       refers to a particular version of a particular message.  The
       uniqueness of the message identifier is guaranteed by the host that
       generates it (see below).  This message identifier is intended to be
       machine readable and not necessarily meaningful to humans.  A message
       identifier pertains to exactly one version of a particular message;
       subsequent revisions to the message each receive new message
       identifiers.

    • Marked as answer by K1llStr1k3 Monday, November 7, 2011 11:01 PM
    Monday, November 7, 2011 9:29 PM

All replies

  • The link between the original and the restored object has been broken, so it is treated as a new message.

    Simon.


    Simon Butler, Exchange MVP
    Blog | Exchange Resources | In the UK? Hire Me.
    Monday, November 7, 2011 8:23 PM
  • Because its a new message.

     

     

    Monday, November 7, 2011 8:23 PM
  • Sembee, 

     

    Thanks for your reply. Do you know if there are articles out there for this? 

    Monday, November 7, 2011 9:22 PM
  • Sembee, 

     

    Thanks for your reply. Do you know if there are articles out there for this? 


    http://tools.ietf.org/html/rfc5322

     

    The "Message-ID:" field provides a unique message identifier that
       refers to a particular version of a particular message.  The
       uniqueness of the message identifier is guaranteed by the host that
       generates it (see below).  This message identifier is intended to be
       machine readable and not necessarily meaningful to humans.  A message
       identifier pertains to exactly one version of a particular message;
       subsequent revisions to the message each receive new message
       identifiers.

    • Marked as answer by K1llStr1k3 Monday, November 7, 2011 11:01 PM
    Monday, November 7, 2011 9:29 PM