[Dovecot] mailsync: NO Unexpected EOF

[SAiello at Jentoo.com]

Hello,

I am trying to migrate off a MS Exchange 5.0 server. I am using mailsync 
(http://www.linux-france.org/prj/imapsync/)  to copy the files to a Dovecot 
server, version 0.99.10.7. For particular messages I get the following error:

Couldn't append msg #114081 (Subject:[RE: balh blah]) to folder INBOX: Error 
trying to append: 826 NO Unexpected EOF

I think this is Dovecot, complaining about the message text that imapsync is 
trying to append/write.  If this is Dovecot, is there any setting I can set 
to fix this?