Thank you, Jérôme. It's rather devious, but it works.
Bill Couringtion >When you're typing an address, and PowerMail suggests an address from >the cache that you want to delete, you can add it to the adress book >(from the contextual menu) then delete it from the address book (by >clicking the delete button on the contact's toolbar; the contact window >should open automatically if this is not disabled in the preferences). >It will be removed from the cache.
