[Mimedefang] Make Relay Servers Queue

[Bob Covell]

> 
> 
> Sendmail does queuing.
> 
> It sounds like your relays depend on the primary for something.  Do they
> need to ask it what recipients are valid?
> 

Yes, they do validate recipients with the backend servers.  So some sort of
"ping" needs to go before this to validate that the servers are there?  If
not queue it?  I assume the queue would have to be initiated by MD, correct?