I'm trying to make Zimbra (v7.1.2) to NOT discard spam. Reading the administrator guide, I found this is expected to happen:

"Anti-spam Settings: (...) Any message tagged between 33%-75% is considered spam and delivered to the userís junk folder. Messages tagged above 75% are always considered spam and discarded."

I'm making some tests, and spam messages that I send dissapear. I don't know if they dissaper because they are discarded (tagged above 75%) or if something isn't working.

How can I configure Zimbra to NEVER discard messages? I need this to tests, and as a policy, since we need to keep ALL messages, even spam.

Thanks in advance!