Forward to recipient,...in the first line of her mailbox file. This will send all incoming mail to the specified list of recipients. Alternatively, she might create a .forward file in her home directory, which contains the comma-separated list of recipients. With this variety of forwarding, all lines of the file are read and interpreted.
Note that any type of address may be used. Thus, a practical example of a .forward file for vacations might be
janet, "|vacation"The first address delivers the incoming message to janet's mailbox nevertheless, while the vacation command returns a short notification to the sender.