Setting up a backup mx in another DC and had quick question. We've got SM installed, incoming gateway config'd for our main install and user verification is set to web service. SM gateway is checked with valid user creds. In the thread that describes the setup, the (current) last comment on there from Brian says that the backup mx checks with the main mail server periodically.
We've had it all setup for a few hours now but in our testing we keep getting bounces from the backup mx server that says the user doesn't exist, even though it is on the main mail server.
So does anyone know the actual time frame that the backup mx servers sync with the main mail server for domain/users lists?