> If you have the freedom to define a new list, companion to the > "conversation" one, you could define for it daily digests (no MAXSIZE > option, here; no need for notebooks, if you keep them, since they are > associated to the main list), and instruct those people to subscribe > there (with default-options DIGESTS). This "daily" list would receive > mail only from its subscription to the main list. A minor point would be > the REPLY-TO field: shouldn't the SENDER keyword make the trick, I see > no simple way to point it to the main list address (and so, an editor > should be asked to redirect occasional replies to the main list). If you use the Respect option in the Reply-to parameter for the daily digest list, it will keep the Reply-to that the first list put in.