We'd like to use the MimeEntity tree to crawl the entire message for known file types we can process. This is because we are getting a lot of incoming emails with attached .EML files that contain files we need to process. Trouble is that it returns un-parsable winmail.dat files (20 yr old TNEF Format).
Now the MailMessage.Attachments collection does not have this problem. So it must contain a usable TNEF parser in there and I was wondering if maybe this was exposed somewhere so that I could use it when crawling the MimeEntity tree.