I know it can be done, but I am just getting lost in all the settings...

My Zimbra server is on a local company network -- there is no connection to the Internet. I want to set it up to dump messages to file instead of trying to send them to SMTP.

Basically, I want to have 2 servers setup one on the outside and one on the intranet.

I need to configure them to dump messages to file and I will transfer the messages between the 2 manually (via USB stick).

I know it sounds dumb, but such is my life...

Any pointers to information on how this can be set up are appreciated.