What we need is a complete conversation between the servers. We're being requested to give the detailed messages between the servers to validate the message delivery.
This would be an example of the log needs: 2019-06-12 12:44:47 SERVER -> CLIENT: 220 indus.server.net ESMTP Postfix 2019-06-12 12:44:47 CLIENT -> SERVER: EHLO smtp1.domain.com 2019-06-12 12:44:47 SERVER -> CLIENT: 250-indus.server.net 250-PIPELINING 250-SIZE 2048000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN 2019-06-12 12:44:47 CLIENT -> SERVER: STARTTLS 2019-06-12 12:44:47 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS 2019-06-12 12:44:47 CLIENT -> SERVER: EHLO smtp1.domain.com 2019-06-12 12:44:47 SERVER -> CLIENT: 250-indus.server.net 250-PIPELINING 250-SIZE 2048000 250-VRFY 250-ETRN 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN 2019-06-12 12:44:47 CLIENT -> SERVER: AUTH LOGIN 2019-06-12 12:44:47 SERVER -> CLIENT: 334 VXNlcm5hbWU6 2019-06-12 12:44:47 CLIENT -> SERVER: RElFR09MQUNPUlRFQEhPVE1BSUwuY29t 2019-06-12 12:44:47 SERVER -> CLIENT: 334 UGFzc3dvcmQ6 2019-06-12 12:44:47 CLIENT -> SERVER: NTJiNmI1 2019-06-12 12:44:47 SERVER -> CLIENT: 235 2.7.0 Authentication successful 2019-06-12 12:44:47 CLIENT -> SERVER: MAIL FROM: 2019-06-12 12:44:47 SERVER -> CLIENT: 250 2.1.0 Ok 2019-06-12 12:44:47 CLIENT -> SERVER: RCPT TO: 2019-06-12 12:44:47 SERVER -> CLIENT: 250 2.1.5 Ok 2019-06-12 12:44:47 CLIENT -> SERVER: DATA 2019-06-12 12:44:47 SERVER -> CLIENT: 354 End data with . 2019-06-12 12:44:47 CLIENT -> SERVER: Date: Wed, 12 Jun 2019 09:44:47 -0300 2019-06-12 12:44:47 CLIENT -> SERVER: To: x...@domain.com 2019-06-12 12:44:47 CLIENT -> SERVER: From: User 2019-06-12 12:44:47 CLIENT -> SERVER: Subject: Email test 2019-06-12 12:44:47 CLIENT -> SERVER: Message-ID: <9e630f8870a4bf79cd684987158be...@smtp1.domain.com> 2019-06-12 12:44:47 CLIENT -> SERVER: X-Mailer: IA-Transactional 2019-06-12 12:44:47 CLIENT -> SERVER: MIME-Version: 1.0 2019-06-12 12:44:47 CLIENT -> SERVER: Content-Type: text/html; charset=utf-8 2019-06-12 12:44:47 CLIENT -> SERVER: Content-Transfer-Encoding: 8bit 2019-06-12 12:44:47 CLIENT -> SERVER: 2019-06-12 12:44:47 CLIENT -> SERVER: This is a test message. 2019-06-12 12:44:47 CLIENT -> SERVER: 2019-06-12 12:44:47 CLIENT -> SERVER: . 2019-06-12 12:44:47 SERVER -> CLIENT: 250 2.0.0 Ok: queued as C8C42209B5 2019-06-12 12:44:47 CLIENT -> SERVER: QUIT 2019-06-12 12:44:47 SERVER -> CLIENT: 221 2.0.0 Bye This were taken from PHPMailer DEBUG mode. Its pretty much the same info we need, but instead of using phpmailer, grabbing from postfix conversations. Any possibility here? Thanks in advance. BR, Rafael