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.sh 1 "Command line options"
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This section describes command line options for
.i Mail
and what they are used for.
.ip \-N
Suppress the initial printing of headers.
.ip \-d
Turn on debugging information.  Not of general interest.
.ip "\-f file"
Show the messages in
.i file
instead of your system mailbox.  If
.i file
is omitted,
.i Mail
reads
.i mbox
in your home directory.
.ip \-i
Ignore tty interrupt signals.  Useful on noisy phone lines, which
generate spurious RUBOUT or DELETE characters.  It's usually
more effective to change your interrupt character to control\-c,
for which see the
.i stty
shell command.
.ip \-n
Inhibit reading of /usr/lib/Mail.rc.  Not generally useful, since
/usr/lib/Mail.rc is usually empty.
.ip "\-s string"
Used for sending mail.
.i String
is used as the subject of the message being composed.  If
.i string
contains blanks, you must surround it with quote marks.
.ip "\-u name"
Read
.i names's
mail instead of your own.  Unwitting others often neglect to protect
their mailboxes, but discretion is advised.
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The following command line flags are also recognized, but are
intended for use by programs invoking
.i Mail
and not for people.
.ip "\-T file"
Arrange to print on
.i file
the contents of the
.i article-id
fields of all messages that were either read or deleted.
.b \-T
is for the
.i readnews
program and should NOT be used for reading your mail.
.ip "\-h number"
Pass on hop count information.
.i Mail
will take the number, increment it, and pass it with
.b \-h
to the mail delivery system.
.b \-h
only has effect when sending mail and is used for network mail
forwarding.
.ip "\-r name"
Used for network mail forwarding:  interpret
.i name
as the sender of the message.  The
.i name
and
.b \-r
are simply sent along to the mail delivery system.  Also,
.i Mail
will wait for the message to be sent and return the exit status.
Also restricts formatting of message.
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Note that
.b \-h
and
.b \-r ,
which are for network mail forwarding, are not used in practice
since mail forwarding is now handled separately.  They may
disappear soon.