Pegasus will not open pdf attachments. Is shows :"filetype Unknown" How do I fix this issue?

Please take a look at this thread: https://community.pmail.com/index.php?u=/topic/11230/downloading-pdf-messages-acting-up-again/post-51570

Also know that "filetype Unknown" does not affect whether the file will open. It simply means that its content-type as defined by the sender is not specific enough for Pegasus Mail to identify the file type. This is becoming an increasing problem as an increasing number of attachments are being transmitted as the generic content-type:application/octet-stream. The appropriate content viewer will still open these files per the discussion referenced by Michael.