==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version: 1.5.2 MARIADB edition.
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version: Ubuntu 20.04
- Store mail accounts in which backend: LDAP
- Web server: Nginx
- Manage mail accounts with iRedAdmin-Pro? - NO
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.

Mar 24 17:36:22 post amavis[703632]: (703632-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <RKasimova@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: 11ctopuFXZae, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 41840 ms
Mar 24 17:36:22 post amavis[703547]: (703547-07) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <riazanski@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: 0ATKBJyw9B2V, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 42115 ms
Mar 24 17:36:22 post postfix/amavis/smtp[784233]: 4KPSSJ1kFjz377LL: to=<TMiheeva@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/8/0.04/40, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703616-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.038 s): id=703616-06 (in reply to end of DATA command))
Mar 24 17:36:22 post amavis[703622]: (703622-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <SPirogov@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: ydruibhkmZtw, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 40943 ms
Mar 24 17:36:22 post amavis[703660]: (703660-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <UPavlova@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: n9okYRJDWSoA, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 39891 ms
Mar 24 17:36:22 post amavis[703599]: (703599-06) (!)rw_loop: leaving rw loop, no progress, last event (select) 35.034 s ago
Mar 24 17:36:22 post amavis[703599]: (703599-06) (!)Hynf7mRolhmg FWD from <aandreev@mydomain.com> -> <USilenko@mydomain.com>,  451 4.5.0 From MTA() during fwd-connect (No greeting, dt: 35.035 s): id=703599-06
Mar 24 17:36:22 post amavis[703606]: (703606-06) (!)rw_loop: leaving rw loop, no progress, last event (select) 35.037 s ago
Mar 24 17:36:22 post amavis[703606]: (703606-06) (!)uzEplbCyQva1 FWD from <aandreev@mydomain.com> -> <TIshcheynova@mydomain.com>,  451 4.5.0 From MTA() during fwd-connect (No greeting, dt: 35.038 s): id=703606-06
Mar 24 17:36:22 post amavis[703599]: (703599-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <USilenko@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: Hynf7mRolhmg, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 39877 ms
Mar 24 17:36:22 post amavis[703606]: (703606-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <TIshcheynova@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: uzEplbCyQva1, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 40515 ms
Mar 24 17:36:22 post amavis[703683]: (703683-06) (!)rw_loop: leaving rw loop, no progress, last event (select) 35.037 s ago
Mar 24 17:36:22 post amavis[703683]: (703683-06) (!)EtQ8fz8C5ePB FWD from <aandreev@mydomain.com> -> <UBelova@mydomain.com>,  451 4.5.0 From MTA() during fwd-connect (No greeting, dt: 35.049 s): id=703683-06
Mar 24 17:36:22 post postfix/amavis/smtp[784404]: 4KPSSJ1kFjz377LL: to=<USilenko@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/8.3/0.14/40, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703599-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.035 s): id=703599-06 (in reply to end of DATA command))
Mar 24 17:36:22 post postfix/amavis/smtp[784021]: 4KPSSJ1kFjz377LL: to=<SPirogov@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/7.2/0.11/41, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703622-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.049 s): id=703622-06 (in reply to end of DATA command))
Mar 24 17:36:22 post amavis[703683]: (703683-06) Blocked MTA-BLOCKED {TempFailedInternal}, ORIGINATING LOCAL [11.22.33.44]:53870 [11.22.33.44] ESMTP/ESMTP <aandreev@mydomain.com> -> <UBelova@mydomain.com>, (ESMTPSA://[11.22.33.44]:53870), Queue-ID: 4KPSSJ1kFjz377LL, mail_id: EtQ8fz8C5ePB, b: yXTkJUNWr, Hits: -0.869, size: 3629161, Subject: "Восстановление работы почты МГТ (raw: =?utf-8?B?0JLQvtGB0YHRgtCw0L3QvtCy0LvQtdC90LjQtSDRgNCw0LHQvtGC0Ysg0L8=?= =?utf-8?B?0L7Rh9GC0Ysg0JzQk)", From: <aandreev@mydomain.com>, helo=[IPv6:::ffff:192.168.1.134], Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,MISSING_MID=0.14,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=no autolearn_force=no, autolearnscore=0.131, dkim_new=dkim:m1.mydomain.com, 39997 ms
Mar 24 17:36:22 post postfix/amavis/smtp[784217]: 4KPSSJ1kFjz377LL: to=<TIshcheynova@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/7.7/0.09/41, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703606-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.038 s): id=703606-06 (in reply to end of DATA command))
Mar 24 17:36:22 post postfix/amavis/smtp[784029]: 4KPSSJ1kFjz377LL: to=<UPavlova@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/8.3/0.04/40, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703660-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.035 s): id=703660-06 (in reply to end of DATA command))
Mar 24 17:36:22 post amavis[703527]: (703527-07) (!)rw_loop: leaving rw loop, no progress, last event (select) 35.033 s ago
Mar 24 17:36:22 post amavis[703527]: (703527-07) (!)FEq9ruZCoxmO FWD from <aandreev@mydomain.com> -> <PHOMENKO@mydomain.com>,  451 4.5.0 From MTA() during fwd-connect (No greeting, dt: 35.035 s): id=703527-07
Mar 24 17:36:22 post postfix/amavis/smtp[784010]: 4KPSSJ1kFjz377LL: to=<UBelova@mydomain.com>, orig_to=<all@mydomain.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=55, delays=6.7/8.3/0.03/40, dsn=4.5.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=703683-06 - Temporary MTA failure on relaying, From MTA() during fwd-connect (No greeting, dt: 35.049 s): id=703683-06 (in reply to end of DATA command))
Mar 24 17:36:22 post amavis[703662]: (703662-07) (!)rw_loop: leaving rw loop, no progress, last event (select) 35.035 s ago
Mar 24 17:36:22 post amavis[703662]: (703662-07) (!)tcR5zwgEpX39 FWD from <aandreev@mydomain.com> -> <ABochkova@mydomain.com>,  451 4.5.0 From MTA() during fwd-connect (No greeting, dt: 35.036 s): id=703662-07

====

mydomain.com - I wrote this for an example. In fact, the domain is different.
Hello! I'm trying to send it to the mail all@mydomain.com (this is a group in AD containing many recipients >400) and partly the mail reaches the recipients, and partly it does not. I can't figure out what the problem is and how to resolve the situation.
I see that the amavisd content filter is responsible for blocking.

What I tried to do: added my networks to 50-user (amavisd config)
@local_domains_maps = 1;
@mynetworks = qw( 127.0.0.0/8 [::1] 127.0.0.1 10.0.0.0/16 10.1.0.0/16 11.22.33.44 55.66.77.88 );

Can you advise me what else to check or configure. I'm in a quandary. thank you!