Example Mail Plugin for Sponge Minecraft Servers
/mail read or /mail inbox to get a list of mail sent to you.
/mail clear or /mail delete to remove all messages from your inbox.
/mail send <username> <message> or /mail write <username> <message> to send to
boformer created the plugin initially.
TechplexEngineer (Blake) ported to Sponge Version 4.0.3