RHEL 9 installation

Hi, new to the forum, not to CipherMail. We need to migrate the CentOS 8 appliance (PGP only) to RHEL, and preferably RHEL 9. Is this an option, or should we stick to RHEL 8? Thanks for this great solution all these years!

RHEL9 should work but the rpm complains about a missing dependency.

You can manually install all dependencies and install the no-deps ( ciphermail-core-os-no-deps-5.5.3.0g99d2faca-1.noarch.rpm) package prior to install the gateway package