There have been multiple indicators, that the postfix TLS settings are
not ideal therefore this patch aims to imprive the situation.

Reference:
https://ssl-config.mozilla.org/#server=postfix&version=3.4.8&config=intermediate&openssl=3.0.8&guideline=5.6

I currently don't really use loki while it causes some trouble due to S3
problems. Therefore this patch drops loki again.

Currently the authentication skipping doesn't work as expected, given
the goal is a public facing status page, for now the uptime-kuma
internal auth will have to do, it'll be replaced soon.