Zephyr is an asynchronous messaging system. It delivers messages to addresses, or triplets, that consist of a class, an instance, and a recipient. The class generally indicates the type of message, e.g. message, login, mail, news. The instance further clarifies the type of message, and may be useful in sending messages to large numbers of people. In the latter case, everyone who is subscribed to the triplet receives the message.
Subscriptions allow zephyr to function as a real-time bulletin board.
The .anyone file should reside in your home directory and consist of a number of lines, each containing a single username. When zephyr starts up, it automatically subscribes you to the subscriptions in your .zephyr.subs file, so you only have to use the add command once. To use zephyr from a Mac, you'll need Andy Maas's software, MacLeland, and the MacZephyr program. Once you've done that, you may launch MacZephyr, which has most of the functionality of the zephyr suite of Unix programs. Then, type your message.