Each user who has an account for the RWTH High Performance Computing is automatically subscribed to the rzcluster mailing list where announcements about the cluster are distributed. First of all, we would like to discourage you from leaving the list since you may miss important information. If you nevertheless want to unsubscribe, you can either delete ("deregister") your account "RWTH High Performance Computing" in the RegApp

Deregister your HPC account

or use the following command in one of the cluster nodes:

r_chfn --rzcluster=no

Note that the command may ask for a password for authentication.