I am using the service called fail2ban and configured mail address over there to receive mails when a intruder is triggered.But I am not receiving mails. I see the below errors.
What exactly is happening.I am not able to understand
Sep 9 11:25:35 c2c-101-208 sendmail[23934]: 289BPZ7G023934: from=net@c2c-101-208.ssdcloudindia.net, size=176, class=0, nrcpts=1, msgid=<202209091125.289BPZ7G023934@c2c-101-208.ssdcloudindia.net>, relay=net@localhost
Sep 9 11:25:35 c2c-101-208 sm-mta[23935]: 289BPZZd023935: from=<net@c2c-101-208.ssdcloudindia.net>, size=464, class=0, nrcpts=1, msgid=<202209091125.289BPZ7G023934@c2c-101-208.ssdcloudindia.net>, proto=ESMTP, daemon=MTA-v4, relay=localhost.localdomain [127.0.0.1]
Sep 9 11:25:35 c2c-101-208 sendmail[23934]: 289BPZ7G023934: to=<ravi@net.in>, ctladdr=net@c2c-101-208.ssdcloudindia.net (1000/1000), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30176, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (289BPZZd023935 Message accepted for delivery)
Sep 9 11:25:36 c2c-101-208 sm-mta[23937]: STARTTLS=client, relay=aspmx.l.google.com., version=TLSv1.3, verify=FAIL, cipher=TLS_AES_256_GCM_SHA384, bits=256/256
Sep 9 11:25:38 c2c-101-208 sm-mta[23937]: 289BPZZd023935: to=<ravi@net.in>, ctladdr=<net@c2c-101-208.ssdcloudindia.net> (1000/1000), delay=00:00:03, xdelay=00:00:03, mailer=esmtp, pri=120464, relay=aspmx.l.google.com. [74.125.24.27], dsn=5.0.0, stat=Service unavailable
Sep 9 11:25:38 c2c-101-208 sm-mta[23937]: 289BPZZd023935: 289BPcZd023937: DSN: Service unavailable
Sep 9 11:25:38 c2c-101-208 sm-mta[23937]: 289BPcZd023937: to=<net@c2c-101-208.ssdcloudindia.net>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30000, dsn=2.0.0, stat=Sent
Any help would be appreciated.
Thanks in advance.
