In this post, we’ll be using Rspamd as an example.
apt-cache policy Look for the repository you want to add, e.g.: Rspamd.
500 http://rspamd.com/apt-stable bookworm/main amd64 Packages release o=Rspamd,n=bookworm,l=Rspamd,c=main,b=amd64 origin rspamd.