Limits

I've learned a little about limits on incoming and outgoing mails to free users by searching the forum, but I wonder whether there is a single place where all limits are comprehensively stated. I only stumbled across the limit on addressees per message while looking for more details on the daily size limit; and I still am not perfectly clear on how that limit is calculated. (Say I've got 4 2mb messages, each of which I send to 40 people. Is that 2 x 4 x 40 = 320 for the day, or is it just 2 x 4 = 8?) Then it appears that there is a limit on bounced messages. I'd like to know whether there are other restrictions I haven't stumbled across yet.

Gary Williams