Theo Van Dinter wrote:
> Huh? SA, and spamassassin specifically, certainly does handle splitting up
> mbox files into invdividual messages. Hence the --mbox option.

I stand corrected.

> spamc, however, does not -- it's one message at a time.

Reasonable enough, given that its primary usage is in the chain of
one-message-at-a-time mail delivery.