Sep 13 02:28:05 ip-172-31-25-143 sendmail[9264]: v8D2S5gQ009264: from=ubuntu@ip-172-31-25-143.ap-south-1.compute.internal, size=141, class=0, nrcpts=1, msgid=<201709130228.v8D2S5gQ009264@ip-172-31-25-143.ap-south-1.compute.internal>, relay=ubuntu@localhost
Sep 13 02:28:05 ip-172-31-25-143 sm-mta[9265]: v8D2S54l009265: from=<ubuntu@ip-172-31-25-143.ap-south-1.compute.internal>, size=487, class=0, nrcpts=1, msgid=<201709130228.v8D2S5gQ009264@ip-172-31-25-143.ap-south-1.compute.internal>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Sep 13 02:28:05 ip-172-31-25-143 sendmail[9264]: v8D2S5gQ009264: to=<kumargauravgupta3@gmail.com>, ctladdr=ubuntu@ip-172-31-25-143.ap-south-1.compute.internal (1000/1000), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30141, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v8D2S54l009265 Message accepted for delivery)
Sep 13 02:28:06 ip-172-31-25-143 sm-mta[9267]: STARTTLS=client, relay=gmail-smtp-msa.l.google.com., version=TLSv1.2, verify=FAIL, cipher=ECDHE-RSA-AES128-GCM-SHA256, bits=128/128
Sep 13 02:28:06 ip-172-31-25-143 sm-mta[9267]: v8D2S54l009265: to=<kumargauravgupta3@gmail.com>, ctladdr=<ubuntu@ip-172-31-25-143.ap-south-1.compute.internal> (1000/1000), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=120487, relay=gmail-smtp-msa.l.google.com. [74.125.200.109], dsn=5.0.0, stat=Service unavailable
Sep 13 02:28:06 ip-172-31-25-143 sm-mta[9267]: v8D2S54l009265: v8D2S64l009267: DSN: Service unavailable
Sep 13 02:28:07 ip-172-31-25-143 sm-mta[9267]: v8D2S64l009267: to=<ubuntu@ip-172-31-25-143.ap-south-1.compute.internal>, delay=00:00:01, xdelay=00:00:01, mailer=local, pri=30000, dsn=2.0.0, stat=Sent