title: Outlook VSTO attach meta data
body: <p>I am writing an Outlook addin that inserts content into an email, and I have a emailSent event that I would like send an event back to my server letting me know some content was shared.</p>
  
  <p>Is there a way to attach some meta information to the email (or the word doc, which is what you are creating in outlook)  so that I can grab that meta info so I can send it back to my server.</p>
  
  <p>Right now, the only way I think I can do it is to search through the email on the send event looking for my content with regex and pull out the info i need, but that seems cumbersome, and also means I need to run the regex for every email sent, even when they haven't added my content.</p>