We are sending on the order of 50-200+ messages per second in this stress test,
so the delay between messages could be smaller than .005 seconds.
Inject 50-200 messages per second into Postfix, and mail will not
be delivered faster than it comes in (unless a backlog develops
and clears when downstream conditions improve).
We don't have a tool to inject at a particular rate, but maybe we can
find one or make one. I was hoping we could handle it in postfix, but it
sounds like a no.
Please consider decimal-second rate limiting as a feature request. :-)
Thanks,
-c