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STARTTLS Issue in Background Authentication with NGINX and Postfix - 2 months ago

Hello, I am making multiple Postfix servers addressable through a single address using an NGINX mail proxy. However, I am experiencing SSL/TLS issues on port 587 or 465. My configuration and the log outputs are as follows. How can I resolve this issue? /var/log/mail.log: Jul 12 22:05:34 mail postfix/submission/smtpd[54599]: connect from unknown Jul 12 22:05:34 mail postfix/submiss