ramin1981 How disable HSTS or HTTPS on the server?
This won’t help you, since HSTS is mainly a browser thing. But you can clear the HSTS information or turn off the check altogether in your browser, which should allow you to access the site again. Of course, you’ll still get a security warning about the expired certificates.
ramin1981 The server cannot update certificate automatically. How to update certificate?
Well on a default installation without a reverse proxy in front it should renew the certificates automatically. You can try to restart the acme container:
docker compose restart acme-mailcow
If it still doesn’t renew, post the output of:
docker compose logs --tail=200 -f acme-mailcow
See also the docs:
https://docs.mailcow.email/post_installation/firststeps-ssl/#lets-encrypt-out-of-the-box