On Thu, Jan 20, 2011 at 04:14:00PM -0500, Paul Amaranth wrote:
> I have an openXchange groupware box running a version of Postfix. We recently
> acquired an external email spam/virus/content filtering box that sits between
> the mail server and the Internet.
Is it a store-and-forward MTA, or a transparent SMTP proxy that forwards
commands and content in real-time to Postfix while the remote client is
still waiting for (at least) the "." response at the end of the message?
Depending on how this appliance is designed, you may be better of inserting
it as a pre-queue proxy filter after Postfix, and before the queue.
> What I need to do now is run all internal email through the filter box.
If the device is a pre-queue filter, all mail goes through it, and then
Postfix routes it to its destination.
> Any advice appreciated.
The proposed configuration is to have Postfix receive the mail, route
it via the appliance as a pre-queue proxy filter, and have the appliance
hand the mail back to Postfix on a different port, where Postfix delivers
the mail. You will not regret having a real MTA manage your queues.
--
Viktor.
