Seems the morphline is transforming the event into one without "body", are you converting the event body into headers?
parseAsFlumeEvent only handles the body, the headers are lost.

On 2 June 2016 at 16:59, George M. <qazw3456@gmail.com> wrote:
With the morphlines and without multiplexing
============================
------------------------------------------
parseAsFlumeEvent = true
------------------------------------------
unixtime1420119195000address,example@example.cosiz1060
                                                            hostip10.1.0.170line_type senderid938223BD77Cevent_route SENDERmessage�2015 Jan 1 14:33:15 10.1.0.170 postfix-dsp/qmgr[5605]: 938223BD77C: from=<example@example.com>, size=1060, nrcpt=1 (queue active)

-------------------------------------------
parseAsFlumeEvent = false
-------------------------------------------
Only new lines