Running a modern mail server is a complicated business. In part, this complication is caused by the series of incrementally developed practices designed to combat the huge flood of spam that dominates modern email communication. An unfortunate side effect is that it prevents people from running their own mail servers, concentrating people on a few big providers. NNCPNET is a suite of software written by John Goerzen based on the node-to-node copy (NNCP) protocol that aims to make running one's own mail servers as easy as it once was. While the default configurations communicates only with other NNCPNET servers, there is a public relay that connects the system to the broader internet mail ecosystem.