This relates to the fact that my company has a lot of remote workers. Security concerns have been raised around someone just going into a business centre at a hotel and then leaving themselves logged into Zimbra with the web client in the history. These type of users are unlikely to respond to training in this area and as long as the window is open for people to be able to do this, it's going to be a problem.
I have it set so that if someone tries to browse away or close the browser they will receive the warning so they can logout.
What I'm wondering is does anyone else have another way to deal with this problem. I would put the server on the VPN so that you have to access it that way but that's going to create problems with those picking up mail with cellphones. The same apples to just allowing access for IP ranges or MAC addresses.
Any thoughts welcomed. The only one I have so far is Mojopac