From HFML-FELIX Wiki
in mailcow terminal:
docker compose exec sogo-mailcow /bin/bash
cd /etc/ssl/certs wget "https://repo.harica.gr/certs/HARICA-Client-Root-2021-RSA.pem" update-ca-certificates --fresh
in mailcow terminal:
docker compose exec sogo-mailcow /bin/bash
cd /etc/ssl/certs wget "https://repo.harica.gr/certs/HARICA-Client-Root-2021-RSA.pem" update-ca-certificates --fresh