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Transport rule for DigitalySigned messages RRS feed

  • Question

  • Hi all,

    Is there a way to apply a transport rule to messages that are digitaly signed? Organization is Exchnge 2007

    Thanks

    Zarko

    Tuesday, June 14, 2011 1:47 PM

Answers

  • Hi,

     

    Transport rules do work for digitally signed messages and encrypted or opaque messages as well, but only aspects that it can access. A rule can still read the message header even if the message body has been encrypted.

     

    And in Exchange 2007, there is no Exception called ‘except if the message type is ‘Signed’’.

     

    Hope this helps.

     

    Thanks


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    • Marked as answer by Sophia Xu Monday, June 20, 2011 6:36 AM
    Thursday, June 16, 2011 3:19 AM

All replies

  • You can apply a transport rule but the sent message will be invalid.  Once the message is digitally signed, Exchange can't come along later with a transport rule and modify it (because it will be invalid).  There are some other threads in the forums that describe what happens (typically, message arrives as an attachment).

     

    Brian

    • Proposed as answer by Brian Svidergol Tuesday, June 14, 2011 5:28 PM
    • Unproposed as answer by ZarkoC Tuesday, June 14, 2011 5:29 PM
    Tuesday, June 14, 2011 5:08 PM
  • Thanks, but is there a way to apply a rule to it. Is there a way to filter out the signed messages and apply rules to them only?
    Tuesday, June 14, 2011 5:31 PM
  • Hi,

    Set-TransportRule –Id “Disclaimer” –ExceptIfMessageTypeMatches "Signed" is valied for Exchange 2010 organizations. Kindly check whether it is applicable to 2007 also. If so you may develop your cmdlet in similar way.

    But I don't see this for Exchange 2007 helps from Microsoft


    Regards from www.windowsadmin.info
     
    Tuesday, June 14, 2011 5:57 PM
  • Hi,

     

    Transport rules do work for digitally signed messages and encrypted or opaque messages as well, but only aspects that it can access. A rule can still read the message header even if the message body has been encrypted.

     

    And in Exchange 2007, there is no Exception called ‘except if the message type is ‘Signed’’.

     

    Hope this helps.

     

    Thanks


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    • Marked as answer by Sophia Xu Monday, June 20, 2011 6:36 AM
    Thursday, June 16, 2011 3:19 AM
  • Hi,

    So basically we cant see if a message is digitaly signed with a transport rule?

    Thanks

    Zarko

    Thursday, June 16, 2011 6:22 AM
  • Hi,

    Yes, the encrypted part of the message cannot be seen if it is digitally signed with a transport rule.

    Thanks


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    Thursday, June 16, 2011 7:57 AM