HELLO
Jul 19 07:21:57 pmg postfix/smtpd[23433]: connect from localhost.localdomain[127.0.0.1]
Jul 19 07:21:57 pmg postfix/smtpd[23433]: C965C301031: client=localhost.localdomain[127.0.0.1], orig_client=maill.heves.gob.pe[192.168.32.200]
Jul 19 07:21:57 pmg postfix/cleanup[23428]: C965C301031: message-id=<ll9te6xfbhn0lbburbmislac.1563538932829@email.android.com>
Jul 19 07:21:57 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 07:21:57 pmg postfix/smtpd[23433]: disconnect from localhost.localdomain[127.0.0.1] ehlo=1 xforward=1 mail=1 rcpt=1 data=1 commands=5
Jul 19 07:22:07 pmg postfix/smtp[23434]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 07:22:09 pmg postfix/smtp[23434]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps11.uccliv.org[88.99.49.202]:25, delay=12, delays=0.01/0.02/11/0.21, dsn=4.7.1, status=deferred (host vps11.uccliv.org[88.99.49.202] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 07:30:27 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 07:30:35 pmg postfix/smtp[23500]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 07:30:38 pmg postfix/smtp[23500]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps20.uccliv.org[88.99.49.211]:25, delay=520, delays=510/0.03/10/0.2, dsn=4.7.1, status=deferred (host vps20.uccliv.org[88.99.49.211] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 07:37:55 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 07:38:03 pmg postfix/smtp[23556]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 07:38:05 pmg postfix/smtp[23556]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps20.uccliv.org[88.99.49.211]:25, delay=968, delays=957/0.02/10/0.2, dsn=4.7.1, status=deferred (host vps20.uccliv.org[88.99.49.211] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 07:56:10 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 07:56:19 pmg postfix/smtp[23696]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 07:56:21 pmg postfix/smtp[23696]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps11.uccliv.org[88.99.49.202]:25, delay=2064, delays=2052/0/11/0.21, dsn=4.7.1, status=deferred (host vps11.uccliv.org[88.99.49.202] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 08:12:15 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 08:12:23 pmg postfix/smtp[23829]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 08:12:25 pmg postfix/smtp[23829]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps2.uccliv.org[88.99.49.193]:25, delay=3028, delays=3018/0.03/10/0.21, dsn=4.7.1, status=deferred (host vps2.uccliv.org[88.99.49.193] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 08:39:32 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 08:39:40 pmg postfix/smtp[24083]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 08:39:43 pmg postfix/smtp[24083]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps20.uccliv.org[88.99.49.211]:25, delay=4665, delays=4655/0.02/11/0.21, dsn=4.7.1, status=deferred (host vps20.uccliv.org[88.99.49.211] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Jul 19 08:59:03 pmg postfix/qmgr[16929]: C965C301031: from=<miguel.gutierrez@heves.gob.pe>, size=4094, nrcpt=1 (queue active)
Jul 19 08:59:14 pmg postfix/smtp[24237]: C965C301031: host uccliv.org[148.251.121.249] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command)
Jul 19 08:59:16 pmg postfix/smtp[24237]: C965C301031: to=<clubterrazas@uccliv.org>, relay=vps29.uccliv.org[88.99.49.220]:25, delay=5839, delays=5826/0.03/13/0.21, dsn=4.7.1, status=deferred (host vps29.uccliv.org[88.99.49.220] said: 450 4.7.1 Client host rejected: cannot find your hostname, [209.45.54.185] (in reply to RCPT TO command))
Could you help me please, do not send emails to that domain.