Obtaining certificate chain for mail.opendoorsuk.org, one moment while we download the mail.opendoorsuk.org certificate and related intermediate certificates...
Revocation check via OCSP and CRL for mail.opendoorsuk.org failed
Sorry, the request for mail.opendoorsuk.org could not be completed...
We could not load the certificate for mail.opendoorsuk.org, it might not exist or we could not reach the server, complete the TLS handshake, etc.
Revoked certificates can't and should not be trusted, these certificate will cause errors like "NET::ERR_CERT_REVOKED" in browsers and expose a security risk.