self-hosted-simplelogin
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Using SMTP Port 587
By default, Postfix used port 25 for SMTP. Is there a way to enable port 587 for secure communication?
I haven't tested much but uncommenting this line should suffice. Postfix responds when I telnet to the port.
https://github.com/springcomp/self-hosted-simplelogin/blob/a9d1e3f6fbc86e75a1f3ec3644efa95e7a5586e7/postfix/conf.d/master.cf#L19