Recently I did some work on receiving MIME or NOT-MIME encoded Messages. Some interesting facts: It is possibly to get encoded Emails (including Email Headers) via PassTrough Pipeline from a POP3 Mailbox and save them to the file system. (don't forget to disable the mime decoder that is integrated in the POP3 adapter) One can easily read these "raw" Emails from the file system and send them to subscribers. Only a pipeline is needed with a MIME decoder and a ContextProperty should be set: CopyMailHeadersToContext...