I have been using Spamsieve as a spam filtering drone on my server for a while and am very happy with it. Up until now, on the other computers, I have used two additional mailboxes in each mail account: TrainGood and TrainSpam. But to use this setup I have to check the account the spam was sent to and then scroll down in Mail to find that account before I can move the message to the TrainGood or TrainSpam mailbox in that account. I see in the manual that I can use a single pair of training mailboxes of one of my accounts. I don’t care what Junk mailbox the spam goes to. It will all end up in the trash anyway.
I would like to use the training mailboxes in the account that is the easiest to access in Mail, in my case it is, most of the time, my iCloud account. Can I leave the other training mailboxes where they are or should I delete them?