@esackbauer
I have made DNS configuration and also dmarc, dkim entry also.
Firewall is disabled in my case
Recent postfix logs are mentioned below.
30/07/2024, 11:31:06 info 68B39260A79: removed
30/07/2024, 11:31:06 info 68B39260A79: to=<.mailid, relay=mx-biz.mail.am0.yahoodns.net[67.195.228.75]:25, delay=8.5, delays=4.5/0.09/3/0.96, dsn=2.0.0, status=sent (250 ok dirdel)
30/07/2024, 11:31:05 info Trusted TLS connection established to mx-biz.mail.am0.yahoodns.net[67.195.228.75]:25: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256
30/07/2024, 11:31:02 info disconnect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
30/07/2024, 11:31:02 info 68B39260A79: from=<mailid>, size=932, nrcpt=1 (queue active)
30/07/2024, 11:31:00 info 68B39260A79: message-id=<53-66a88180-3-6f4b1a00@158860331>
30/07/2024, 11:31:00 info 68B39260A79: replace: header Received: from 9e3e8df6319c (mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network [172.22.1.248])??(Authenticated sender: mailid)??by mailbx.aissel.com (Postcow) with from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]; from=<mailid> to=<mailid> proto=ESMTP helo=<9e3e8df6319c>: Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPA id 68B39260A79??for <mailid>; Tue, 30 Jul 2024 11:30:58 +0530 (IST)
30/07/2024, 11:31:00 info 68B39260A79: client=mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248], sasl_method=PLAIN, sasl_username=mailid
30/07/2024, 11:30:58 info connect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]
30/07/2024, 11:28:25 info disconnect from unknown[172.22.1.1] helo=1 starttls=1 commands=2
30/07/2024, 11:28:25 info lost connection after STARTTLS from unknown[172.22.1.1]
30/07/2024, 11:28:25 info Anonymous TLS connection established from unknown[172.22.1.1] to mailbx.aissel.com: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
30/07/2024, 11:28:25 info connect from unknown[172.22.1.1]
30/07/2024, 11:28:25 info ALLOWLISTED [172.22.1.1]:41298
30/07/2024, 11:28:25 info CONNECT from [172.22.1.1]:41298 to [172.22.1.253]:25
30/07/2024, 11:27:07 info disconnect from unknown[172.22.1.1] helo=1 starttls=1 commands=2
30/07/2024, 11:27:07 info lost connection after STARTTLS from unknown[172.22.1.1]
30/07/2024, 11:27:07 info Anonymous TLS connection established from unknown[172.22.1.1] to mailbx.aissel.com: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
30/07/2024, 11:27:07 info connect from unknown[172.22.1.1]
30/07/2024, 11:27:07 info ALLOWLISTED [172.22.1.1]:43952
30/07/2024, 11:27:07 info CONNECT from [172.22.1.1]:43952 to [172.22.1.253]:25
30/07/2024, 11:22:55 info disconnect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3] ehlo=1 starttls=1 commands=2
30/07/2024, 11:22:55 info lost connection after STARTTLS from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
30/07/2024, 11:22:55 info Anonymous TLS connection established from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
30/07/2024, 11:22:55 info connect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
30/07/2024, 11:22:55 info ALLOWLISTED [172.22.1.3]:43878
30/07/2024, 11:22:55 info CONNECT from [172.22.1.3]:43878 to [172.22.1.253]:25
30/07/2024, 11:22:55 info disconnect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3] ehlo=1 starttls=1 commands=2
30/07/2024, 11:22:55 info lost connection after STARTTLS from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
30/07/2024, 11:22:55 info Anonymous TLS connection established from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
30/07/2024, 11:22:55 info connect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
30/07/2024, 11:22:55 info ALLOWLISTED [172.22.1.3]:43876
30/07/2024, 11:22:55 info CONNECT from [172.22.1.3]:43876 to [172.22.1.253]:25
30/07/2024, 11:22:55 info cache proxy:btree:/var/lib/postfix/postscreen_cache full cleanup: retained=0 dropped=0 entries
29/07/2024, 11:22:30 info disconnect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3] ehlo=1 starttls=1 commands=2
29/07/2024, 11:22:30 info lost connection after STARTTLS from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
29/07/2024, 11:22:30 info Anonymous TLS connection established from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
29/07/2024, 11:22:30 info connect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
29/07/2024, 11:22:30 info ALLOWLISTED [172.22.1.3]:44818
29/07/2024, 11:22:30 info CONNECT from [172.22.1.3]:44818 to [172.22.1.253]:25
29/07/2024, 11:22:30 info disconnect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3] ehlo=1 starttls=1 commands=2
29/07/2024, 11:22:30 info lost connection after STARTTLS from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
29/07/2024, 11:22:30 info Anonymous TLS connection established from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
29/07/2024, 11:22:30 info connect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
29/07/2024, 11:22:29 info ALLOWLISTED [172.22.1.3]:44812
29/07/2024, 11:22:29 info CONNECT from [172.22.1.3]:44812 to [172.22.1.253]:25
29/07/2024, 11:22:29 info cache proxy:btree:/var/lib/postfix/postscreen_cache full cleanup: retained=0 dropped=0 entries
28/07/2024, 11:22:05 info disconnect from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3] ehlo=1 starttls=1 commands=2
28/07/2024, 11:22:05 info lost connection after STARTTLS from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]
28/07/2024, 11:22:05 info Anonymous TLS connection established from mailcowdockerized-acme-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.3]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256