Dear All,
Yesterday I've upgrade ZCS 6.0.2 OSE to ZCS 6.0.5, on my zimbra I'm using external smtp relay (
Now I want to use zimbra MTA as outgoing email, but I can't change "Relay MTA for external delivery:" from zimbra administration panel. I get the following error when I trying to change some settings and save these setting, please see below:

Invalid Value! Message: Error! Value for MTA Trusted Networks must contain local network interfaces:
Additional information about MTA Trusted Networks configuration can be found at

$ postconf -n | grep mynetworks
mynetworks =

On my network interface:

Anyone know about this?
This may zimbra's bug?