% diagram 4 \verbatim From: <??me>Message Agent \<<me>> To: <reply-to|from> Fcc: +rcvtrip Fcc: <??fcc><fcc> Subject: <??subject>BEEP! Re: <subject> Subject: <!subject>BEEP! In-reply-to: <??date><??message-id>Your message of <date>. <message-id> In-reply-to: <??date><!message-id>Your message of <date>. -------- This is an automatic reply. Feel free to send additional mail, as only this one notice will be generated. I am attending the USENIX Summer '85 conference in Portland, Oregon. I expect to be reading mail again on the 16th of June. /mtr ?endverbatim