I can’t configure the TLSA cert correctly . I am running behind an Apache proxy.
The mailcow timesout and does not give a correct SHA to configure. I tried using https://www.huque.com/bin/gen_tlsa to generate a SHA from the cert.pem file but it does not validate. I tried runing the NC command in the container and it fails. And on my local server it shows
nc -4 box.webhoran.com 25
220 box.webhoran.com ESMTP Postcow
What am I doing wrong? I did not have DNSSEC enabled before and it was failing because of this now the SHA is failing.