i get the error D039 - no attachment data to the postmaster account.
when i try to requeue these messages i get the same error agin.

i found out that these messages are created outside of our system with blackberry device and exchange.
this mails are ics appointments.

when the same user from outside sends this via outlook/exchange then the appointment appears in the right way in the calendar.

when i try to disable the GWIA ICAL conversion then the appointments arrive in the PO without errors.