The traditional eMule network relies on (often called ED2K servers). These servers do not host files themselves. Instead, they act as directories: when you connect to a server, you tell it which files you are sharing, and you ask it where to find files others are sharing.
For a stable experience, modern eMule users often automate their lists: Auto-Update : You can set eMule to automatically update its server list at startup by pointing it to a reliable server.met Community Maintenance : Projects like the eMule Community version on SourceForge emule kad server list