While auto-update solutions exist, there are challenges and limitations to consider:
Use the auto-update to get the initial list, but then filter aggressively. Go into your eMule settings and check options like: emule server list auto update
The mechanism is simple but effective. Instead of manually typing in IP addresses, you provide eMule with a URL to a text file hosted on a trusted website. This text file contains a list of server addresses and their names. While auto-update solutions exist, there are challenges and