On Thu, Apr 03, 2025 at 11:16:15AM +0200, Paul Neuwirth via
Postfix-users wrote:
> after an upgrade of postfix I am checking my config.
>
> I am in the impression, this should work:
> # openssl s_client -connect mail.swabian.net:465 -starttls smtp
> -tls1_3 CONNECTED(00000003)
> Didn't find STARTTLS in server response, trying anyway...
> write:errno=32
On Thu, 3 Apr 2025 11:22:24 +0200
"Herbert J. Skuhra via Postfix-users" <postfix-users@postfix.org> wrote:
Either remove '-starttls smtp' or use port 587.
On 03.04.25 11:29, Paul Neuwirth via Postfix-users wrote:
ok, that means I was wrong with the impression, that this should work
on port 465.
"-starttls smtp" should work on ports 25/587 where plaintext is default.
(587 should require starttle before it allows anything).
on port 465, TLS should be the default and starttls should not make sense.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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