When running in a rio (1) window, marshal automatically puts the window into hold mode (see rio (1)); this means that the message can be edited freely, because nothing will be sent to marshal until the ESC key is hit to exit hold mode.
The options are: .TF "-a file"
-a file directs marshal to append file as a mime attachment. Unless explicitly specified by the -t option, the type of the attachment is determined by running the file (1) command.
-A file is like -a but the message disposition is marked as inline directing any mail reader to display the attachment (if it can) when the mail message is read.
-C copyaddr adds a Cc: header with copyaddr and also adds copyaddr as a recipient.
-n intentionally no standard input
-#xr are all passed as command line options to the send that marshal invokes.
-R replymsg tells marshal what message this one is in reply to. Replymsg is an upasfs (4) directory containing the message. Marshal uses any message id in this message in its In-Reply-To field. It also passes the directory to /mail/box/ username /pipefrom in the replymsg environment variable. Thus, pipefrom can alter the message to somehow match the reply to the message it is replying to.
-s subject adds a Subject: header line to the message if one does not already exist.
-t type sets the content type for the attachments from all subsequent -a and -A options.
Marshal also expands any user mail aliases contained in /mail/box/ username /names. The format of the alias file is the same as that for system aliases, see aliasmail (8).
Marshal uses the login name as the reply address. This can be overriden using the environment variable upasname . Its value will become both the envelope and From: mailbox name. For example:
.EX upasname=natasha@kremvax.com upas/mail boris@squirrel.com