I will be new to SpamSieve and would like to set it up to use per-server (IMAP) spam folders. I would like to use existing folders for this - i.e. I already have, and have been using, spam folders on each of the servers where I have email accounts. After reading through the manual (and I may have just missed it - if so, sorry) it isn’t clear to me whether I need to empty each of these before I set up SpamSieve. I would rather not since for various reasons I keep some old spam messages. Is it necessary to empty all of these folders first? And if so can I move their contents somewhere else temporarily and then move them back after setting up SpamSieve?
P.S. I will be using SpamSieve from Mail.app.