Write approval mail data to sqlserver use RoutingAgent class

Question

In exchange server  create some TransportRule. Like this:
New-TransportRule "Approval1" -HeaderContainsMessageHeader "X-Approval" -HeaderContainsWords "test1-Approval" -ModerateMessageByUser
[email protected],[email protected]
New-TransportRule "Approval2" -HeaderContainsMessageHeader "X-Approval" -HeaderContainsWords "test2-Approval" -ModerateMessageByUser
[email protected],[email protected]
When user send email , and test2 user approval this email , I want write some data (from,to,subject,body,sendtime,approvalUser,approvalResult) to sql server ,
In custom RoutingAgent  class OnSubmittedMessage method,
if MapiMessageClass =IPM.Note.Microsoft.Approval.Reply.Approve  this mail is approval mail, and MapiMessageClass= IPM.Note.Microsoft.Approval.Request.Recall or IPM.Note.Microsoft.Approval.Request.reject
but I don’t The original message, The relationship between them was found.
Thanks all.
Anything is Possible！

Answer 1

You would need to use the PidTagReportTag property https://msdn.microsoft.com/en-us/library/ee160822%28v=exchg.80%29.aspx to relate the message (although this would
contain information about the Message that is being stored in the Arbitration mailbox). But this property would be both present in the Moderation request and Moderation response. To read that property in the Transport Agent you will need to use the TNEFReader
eg
http://gsexdev.blogspot.com.au/2011/04/reading-custom-mapi-properties-in.html
Cheers
Glen