I use Apple Mail Version 4.6 (1085) under OS 10.6.8. From time to time I find this kind of thing in my Inbox:
--_004_366988BF4C7E3E47BD2D208797A90F7E01662044FD892008SERVERL_ Content-Type: multipart/alternative; boundary="_000_366988BF4C7E3E47BD2D208797A90F7E01662044FD892008SERVERL_"
--_000_366988BF4C7E3E47BD2D208797A90F7E01662044FD892008SERVERL_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64
All my mail goes through my university and is forwarded to Apple Mail. I don't think anything is changed by the forwarding process, though I'm not 100% sure about this. When I look at the same message using the university's webmail system, the message has been correctly interpreted and I can just read it without further ado.
Have I got some setting wrong on my Apple Mail preferences, or is Apple Mail unable to deal dorrectly with messages of this kind. I suppose that the message may not adhere totally strictly to the correct protocol.
Any help to get my Apple Mail working as I would like would be much appreciated.