When using the Zimbra web client to mark a message as Junk, I find that a message is sent to the catchall account with the subject
zimbra-spam-report: richard@hddbroker.com: spam. There is no messages in the spam training mail account at all.
I tested the notjunk@domain alias created for the ham training account and it seems to work fine. If I forward a message to notjunk@domain or click the Not Junk button in the Zimbra web client, I see the messages in the ham training account.
It appears that on my installation that the spam training account isn't being recognized for some reason. Can this account be re-created or re-initialized or something?