Hi all, Is there a way to apply a transport rule to messages that are digitaly signed? Organization is Exchnge 2007 Thanks Zarko

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

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?

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

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.

Hi, So basically we cant see if a message is digitaly signed with a transport rule? Thanks Zarko

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