In the process of integrating PowerMTA in Mumara. I chose TLS, but after a successful installation when sending a letter, I saw an error for each IP:
Expected response code 220 but got code "502", with message "502 5.5.1 command not supported in "STARTTLS" "
What can I do? I understand that I have to install an SSL certificate before? But in this case, should I install a web server? Or can I install only PowerMTA + SSL?
How to do it right? And does the presence of SSL affect the best delivery of letters?
Answer.
Expected response code 220 but got code "502", with message "502 5.5.1 command not supported in "STARTTLS" "
What can I do? I understand that I have to install an SSL certificate before? But in this case, should I install a web server? Or can I install only PowerMTA + SSL?
How to do it right? And does the presence of SSL affect the best delivery of letters?
Answer.