On 10/06/2019 01:51, Robert Scheck via dovecot wrote:

Hello all,

I'm currently wondering whether Dovecot submission proxy service supports RFC 8314 § 3.3 as well, which means implicit TLS for SMTP submission.

https://github.com/dovecot/core/blob/2cbbe9b4829adb184c83dbf780316f414455905... from Git master just mentions port 587 like this:

service submission-login { inet_listener submission { #port = 587 } }

As per RFC 8314 § 3.3, I would expect the following to work (which I did not try), and if it already works, I even would expect this snippet part of the future Dovecot example/default configuration:

service submission-login { inet_listener submission { #port = 587 } inet_listener submissions { #port = 465 #ssl = yes } }

And if it isn't supported yet, I would indeed like to raise this as feature request. Note that 465 is named "submissions" as per RFC 8314 § 7.3.

That should work. Just try it.

Regards,

Stephan.