mail
[options] [users]Read mail (if no users listed), or send mail to other users. Type ?
for a summary of commands. Esoteric debugging options exist (not listed) for system administrators. See also mailx and vacation.
-m
typePrint a "Message-type:" line at the heading of the letter, followed by type of message.
-t
Print a "To:" line at the heading of the letter, showing the names of the recipients.
-w
Force mail to be sent to remote users without waiting for remote transfer program to complete.
-e
Test for the existence of mail without printing it. Exit status is 0 if mail exists; otherwise 1.
-f
fileRead mail from alternate mailbox file.
-F
namesForward all incoming mail to recipient names. SVR4 only. (See vacation in Appendix B.)
-h
Display a window of messages rather than the latest message.
-p
Print all messages without pausing.
-P
Print messages with all header lines displayed.
-q
Terminate on an interrupt.
-r
Print oldest messages first.