We are using the streaming feature to get a MIME representation according to
the documention 1.16.
&mime=1: Specifying &mime=1 in the URL returns the MIME representation
(RFC822) of the item. You need to pass in the ID of the item and not the
attachment when getting the MIME representation.

This does working very fine if the returned data is less than 64MB.
If the resulting data exceeds this size we only get zeros.

Might this be a problem with the SOAP api or should we take a closer look at
our code?