This is the only log info i get when using port 587 , SSL enabled.
2020-05-24T19:17:05.215Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,0,149.56.192.241:587,149.56.192.241:8645,+,,
2020-05-24T19:17:05.216Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,1,149.56.192.241:587,149.56.192.241:8645,>,"220 mai1l.suncityhost.net Microsoft ESMTP MAIL Service ready at Sun, 24 May 2020 15:17:05 -0400",
2020-05-24T19:17:05.216Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,2,149.56.192.241:587,149.56.192.241:8645,<,EHLO smtp.availability.contoso.com,
2020-05-24T19:17:05.216Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,3,149.56.192.241:587,149.56.192.241:8645,>,250 mai1l.suncityhost.net Hello [149.56.192.241] SIZE 37748736 PIPELINING DSN ENHANCEDSTATUSCODES STARTTLS AUTH GSSAPI NTLM 8BITMIME BINARYMIME CHUNKING SMTPUTF8,
2020-05-24T19:17:05.216Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,4,149.56.192.241:587,149.56.192.241:8645,<,QUIT,
2020-05-24T19:17:05.217Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,5,149.56.192.241:587,149.56.192.241:8645,>,221 2.0.0 Service closing transmission channel,
2020-05-24T19:17:05.217Z,MAIL1\Client Frontend MAIL1,08D7FFF634D01F45,6,149.56.192.241:587,149.56.192.241:8645,-,,Local