Dear all.
I have noticed that in our Zimbra 7.1.4 when I setup an outgoing email message filter it applies for sure when emails are sent using the web portal of Zimbra but NOT always when using clients like MS Outlook 2010, Thunderbird etc.
The request is to forward all sent emails to another account but I do not want to use POSTFIX to make this happen. I hopped for Zimbra outgoing filter rules to work but they don't seem to do so, or I am missing something.
Any suggestions?
Thank you in advance!

Dennis.