On Fri, 5 Sep 2025 15:39:40 -0400
Phil Stracchino via Postfix-users <postfix-users@postfix.org> wrote:

> The solution to this problem turned out to be to modify my LE
> deployment post-hook to also deploy fullchain.pem into /etc/postfix
> as well as cert.pem, and then change dovecot's ssl_cert configuration
> to use fullchain.pem instead of cert.pem.

Using fullchain has always been required. Only because of chain caching
done by some software your setup worked before.

-- 
Tuomo Soini <t...@foobar.fi>
Foobar Linux services
+358 40 5240030
Foobar Oy <https://foobar.fi/>
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