+H HumanNodeName Human-readable name of system message originated on.
+I Original ID A 32-bit integer containing the message ID on the
+ system the message *originated* on.
+M Message Text Normal ASCII, newlines seperated by CR's or LF's,
+ null terminated as always.
+N Nodename Contains node name of system message originated on.
+O Room Room of origin.
+P Path Complete path of message, as in the UseNet news
+ standard. A user should be able to send UUCP mail to
+ this path. (Note that your system name will not be
+ tacked onto this until you're sending the message to
+ someone else)
+R Recipient Only present in Mail messages.