Now I resolved this issue of receiving mails,,,
but when i am configuring an account in outlook 2016 the LOG file gives me following error:
Feb 27 18:01:28 mail postfix/submission/smtpd[9656]: connect from unknown[103.210.46.27]
Feb 27 18:01:29 mail postfix/submission/smtpd[9656]: Anonymous TLS connection established from unknown[103.210.46.27]: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)
Feb 27 18:01:29 mail postfix/submission/smtpd[9656]: NOQUEUE: reject: RCPT from unknown[103.210.46.27]: 554 5.7.1 <unknown[103.210.46.27]>: Client host rejected: Access denied; from=<office@local.powerguru.co.in> to=<office@local.powerguru.co.in> proto=ESMTP helo=<PGuruOffice>
Feb 27 18:01:29 mail postfix/submission/smtpd[9656]: lost connection after RCPT from unknown[103.210.46.27]
Feb 27 18:01:29 mail postfix/submission/smtpd[9656]: disconnect from unknown[103.210.46.27]