monit 5.12 sending to Exchange

[Len Conrad]

I reported this earlier but can't find a response, was same with 5.9 and 5.12.

I had one, now two machines where monit is configged to send mail direct to IP 
of Exchange.
  
the monit msgs are delivered to Exch, REPEATEDLY, every 2 minutes because the 
SMTP dialog doesn't complete to monit's satisfaction, defers them in 
/var/db/monit and keeps retrying.

monit -vv  doesn't help,  monit.log just shows SMTP send failing, but not 
precisely why.

help

Len