I've created a repository with Courier RPM packages built for CentOS 7 x86_64. The packages are compiled and signed automatically in a toolchain I have automated - but no particular reseach, tweaks or testing has been done to ensure that the packages are suitable for deployment. The packages were created because I want to work on Ajenti-V's Mail plugin and support my platform of choice for servers (CentOS) which doesn't currently have Courier packages available through repos (at least none of any repute).
DDEVnet.net is now running on a new server, in Australia. I also took the opportunity to replace my personal website, HTTP server and change my mail setup. Rather than coming out scarred, I've come through enlightened and more enthusiastic than ever.