I often found emails from my colleagues in my junk box. (Zimbra Open Source edition 7)
For example, my email address is firstname.lastname@example.org. My boss' is email@example.com. And the Zimbra server is working for @abc.com.
And I found an email from firstname.lastname@example.org in my Junk.
Isn't weird? Zimbra marks an email sent by itself as a spam.
I couldn't resolve this problem even I have added abc.com to the White List. (with MMORSE's method from how to build a white list?)
I'll appreciate for any suggestion.