Please help me solve this issue.
Zimbra Logs
Sep 29 10:44:45 mail zmconfigd[250029]: Fetching All configs
Sep 29 10:44:45 mail zmconfigd[250029]: All configs fetched in 0.02 seconds
Sep 29 10:44:48 mail zmconfigd[250029]: Command not defined for imapd
Sep 29 10:44:48 mail /postfix-script[40311]: the Postfix mail system is running: PID: 253232
Sep 29 10:44:49 mail zmconfigd[250029]: Watchdog: service antivirus status is OK.
Sep 29 10:44:49 mail zmconfigd[250029]: All rewrite threads completed in 0.00 sec
Sep 29 10:44:49 mail zmconfigd[250029]: All restarts completed in 0.00 sec
Sep 29 10:44:52 mail postfix/smtps/smtpd[38388]: NOQUEUE: filter: RCPT from xxx-xxx-38-206.static.asianet.co.th[xxx.xxx.38.206]: <xxx@obotrons.net>: Sender address triggers FILTER smtp-amavis:[127.0.0.1]:10026; from=<xxx@obotrons.net> to=<xxx@hotmail.com> proto=ESMTP helo=<[xxx.xxx.102.249]>
Sep 29 10:44:52 mail postfix/smtps/smtpd[38388]: 3F4041DAE23: client=xxx-xxx-38-206.static.asianet.co.th[xxx.xxx.38.206], sasl_method=LOGIN, sasl_username=xxx@obotrons.net
Sep 29 10:44:52 mail postfix/cleanup[40481]: 3F4041DAE23: message-id=<C0B99FD3-55BF-422A-8CE6-1196D57E339F@obotrons.net>
Sep 29 10:44:52 mail postfix/qmgr[253234]: 3F4041DAE23: from=<xxx@obotrons.net>, size=2343, nrcpt=1 (queue active)
Sep 29 10:44:52 mail amavis[252778]: (252778-01) ESMTP [127.0.0.1]:10026 /opt/zimbra/data/amavisd/tmp/amavis-20200929T104452-252778-DpvhOdJh: <xxx@obotrons.net> -> <xxx@hotmail.com> Received: from mail.obotrons.net ([127.0.0.1]) by localhost (mail.obotrons.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP for <xxx@hotmail.com>; Tue, 29 Sep 2020 10:44:52 +0700 (+07)
Sep 29 10:44:52 mail amavis[252778]: (252778-01) Checking: PkG5puh5b535 ORIGINATING [xxx.xxx.38.206] <xxx@obotrons.net> -> <xxx@hotmail.com>
Sep 29 10:44:52 mail clamd[252971]: SelfCheck: Database status OK.
Sep 29 10:44:52 mail postfix/dkimmilter/smtpd[40484]: connect from localhost[127.0.0.1]
Sep 29 10:44:52 mail postfix/dkimmilter/smtpd[40484]: 5EDBB218306: client=localhost[127.0.0.1]
Sep 29 10:44:52 mail postfix/cleanup[40481]: 5EDBB218306: message-id=<C0B99FD3-55BF-422A-8CE6-1196D57E339F@obotrons.net>
Sep 29 10:44:52 mail opendkim[252993]: 5EDBB218306: no signing table match for 'xxx@obotrons.net'
Sep 29 10:44:52 mail postfix/qmgr[253234]: 5EDBB218306: from=<xxx@obotrons.net>, size=2822, nrcpt=1 (queue active)
Sep 29 10:44:52 mail amavis[252778]: (252778-01) PkG5puh5b535 FWD from <xxx@obotrons.net> -> <xxx@hotmail.com>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10030): 250 2.0.0 Ok: queued as 5EDBB218306
Sep 29 10:44:52 mail amavis[252778]: (252778-01) Passed CLEAN {RelayedOutbound}, ORIGINATING LOCAL [xxx.xxx.38.206]:59101 [xxx.xxx.38.206] <xxx@obotrons.net> -> <xxx@hotmail.com>, Queue-ID: 3F4041DAE23, Message-ID: <C0B99FD3-55BF-422A-8CE6-1196D57E339F@obotrons.net>, mail_id: PkG5puh5b535, Hits: -, size: 2343, queued_as: 5EDBB218306, 149 ms
Sep 29 10:44:52 mail postfix/smtp[40482]: 3F4041DAE23: to=<xxx@hotmail.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=0.19, delays=0.03/0.01/0.01/0.14, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10030): 250 2.0.0 Ok: queued as 5EDBB218306)
Sep 29 10:44:52 mail postfix/qmgr[253234]: 3F4041DAE23: removed
Sep 29 10:44:52 mail amavis[252778]: (252778-01) extra modules loaded: Mozilla/CA.pm
Sep 29 10:44:52 mail amavis[252775]: (252775-01) ESMTP [127.0.0.1]:10032 /opt/zimbra/data/amavisd/tmp/amavis-20200929T104452-252775-Y5TPZvey: <xxx@obotrons.net> -> <xxx@hotmail.com> SIZE=2822 Received: from mail.obotrons.net ([127.0.0.1]) by localhost (mail.obotrons.net [127.0.0.1]) (amavisd-new, port 10032) with ESMTP for <xxx@hotmail.com>; Tue, 29 Sep 2020 10:44:52 +0700 (+07)
Sep 29 10:44:52 mail amavis[252775]: (252775-01) Checking: fDBPRpRyJxet ORIGINATING_POST/MYNETS [127.0.0.1] <xxx@obotrons.net> -> <xxx@hotmail.com>
Sep 29 10:44:52 mail postfix/amavisd/smtpd[40487]: connect from localhost[127.0.0.1]
Sep 29 10:44:52 mail postfix/amavisd/smtpd[40487]: 8CE9F248E28: client=localhost[127.0.0.1]
Sep 29 10:44:52 mail postfix/cleanup[40481]: 8CE9F248E28: message-id=<C0B99FD3-55BF-422A-8CE6-1196D57E339F@obotrons.net>
Sep 29 10:44:52 mail postfix/qmgr[253234]: 8CE9F248E28: from=<xxx@obotrons.net>, size=3187, nrcpt=1 (queue active)
Sep 29 10:44:52 mail amavis[252775]: (252775-01) fDBPRpRyJxet FWD from <xxx@obotrons.net> -> <xxx@hotmail.com>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 8CE9F248E28
Sep 29 10:44:52 mail amavis[252775]: (252775-01) Passed CLEAN {RelayedOutbound}, ORIGINATING_POST/MYNETS LOCAL [127.0.0.1]:39030 [xxx.xxx.38.206] <xxx@obotrons.net> -> <xxx@hotmail.com>, Queue-ID: 5EDBB218306, Message-ID: <C0B99FD3-55BF-422A-8CE6-1196D57E339F@obotrons.net>, mail_id: fDBPRpRyJxet, Hits: 0.102, size: 2788, queued_as: 8CE9F248E28, 145 ms
Sep 29 10:44:52 mail postfix/smtp[40482]: 5EDBB218306: to=<xxx@hotmail.com>, relay=127.0.0.1[127.0.0.1]:10032, delay=0.2, delays=0.04/0.01/0.01/0.14, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 8CE9F248E28)
Sep 29 10:44:52 mail postfix/qmgr[253234]: 5EDBB218306: removed
Sep 29 10:44:52 mail amavis[252775]: (252775-01) extra modules loaded: Mozilla/CA.pm
Sep 29 10:44:53 mail postfix/smtp[40488]: 8CE9F248E28: to=<xxx@hotmail.com>, relay=hotmail-com.olc.protection.outlook.com[104.47.12.33]:25, delay=0.84, delays=0/0.01/0.63/0.2, dsn=5.7.1, status=bounced (host hotmail-com.olc.protection.outlook.com[104.47.12.33] said: 550 5.7.1 Service unavailable, Client host [xxx.xxx.161.18] blocked using Spamhaus. To request removal from this list see https://www.spamhaus.org/query/ip/xxx.xxx.161.18 (AS3130). [DB3EUR04FT025.eop-eur04.prod.protection.outlook.com] (in reply to MAIL FROM command))
Sep 29 10:44:53 mail postfix/smtp[40488]: 8CE9F248E28: lost connection with hotmail-com.olc.protection.outlook.com[104.47.12.33] while sending RCPT TO
Sep 29 10:44:53 mail postfix/cleanup[40481]: 6824F248E2B: message-id=<20200929034453.6824F248E2B@mail.obotrons.net>
Sep 29 10:44:53 mail postfix/bounce[40489]: 8CE9F248E28: sender non-delivery notification: 6824F248E2B
Sep 29 10:44:53 mail postfix/qmgr[253234]: 6824F248E2B: from=<>, size=5633, nrcpt=1 (queue active)
Sep 29 10:44:53 mail postfix/qmgr[253234]: 8CE9F248E28: removed
Sep 29 10:44:53 mail postfix/lmtp[40490]: 6824F248E2B: to=<xxx@obotrons.net>, relay=mail.obotrons.net[xxx.xxx.0.35]:7025, delay=0.16, delays=0/0.01/0.09/0.06, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)
Sep 29 10:44:53 mail postfix/qmgr[253234]: 6824F248E2B: removed
