Users with forward set receive duplicate messages at destination
I have this problem with a new installation of Zimbra, that I am trying to solve for the last days, without success.
Everything is running smoothly, except for one thing: the accounts that have forward addresses configured receive duplicate messages at the destination every single time.
I tried everything and read thousands of articles on the Internet, without any luck.
Can anyone give me some advice please?
I can post every detail of the installation, just ask.