Toltec Connector related question

[Andreas Gungl]

Hello,

Usually the generated events (to be stored on a Kolab 2 server) have a 
message part with content type like this:
     Content-Type: application/x-vnd.kolab.event

Now I've found messages with such a content type:
     Content-Type: application/x-vnd.kolab.o-IPM

Is there a meaning behind that?

Regards,
Andreas