On Sat, 1 Apr 2017 12:43:29 +0000 (UTC), Bhushan Bhosale stated:

Dear Team, I'm getting issue with port 995 by using Microsoft Outlook 2016 only. The error on Microsoft Outlook showing "Your server does not support the connection encryption type. Try changing the encryption method". The error is only who is using Microsoft outlook2016. Kindly help. Thanks and Regards, Bhushan Bhosale

Well, it is telling you that you have a problem with the type of encryption you are using. It would help to debug this problem is you posted the output of "dovecot -n".

-- Jerry