> Why it wasn't just named mail, and if the old one was kept around, it could be mail-old, I don't know. Probably because mail system hostnames end up hardcode

> Why it wasn't just named mail, and if the old one was kept around, it could be mail-old, I don't know. Probably because mail system hostnames end up hardcoded in configuration files all over the place, and it's easier to add one and mirror onto it than to migrate the hardware while keeping the name.