Sam Jones: > That looks like a good starting point, Thank you for the pointers > Robert, really appreciated.
You need to keep the following in mind, if you ever decide to use a per-destination recipient of 1. Wietse default_destination_rate_delay (default: 0s) The default amount of delay that is inserted between individual deliv- eries to the same destination; the resulting behavior depends on the value of the corresponding per-destination recipient limit. o With a corresponding per-destination recipient limit > 1, the rate delay specifies the time between deliveries to the same domain. Different domains are delivered in parallel, subject to the process limits specified in master.cf. o With a corresponding per-destination recipient limit equal to 1, the rate delay specifies the time between deliveries to the same recipient. Different recipients are delivered in parallel, sub- ject to the process limits specified in master.cf.