Hi Danny,
Throughput can depend on multiple factors (both hardware and software) among which:
- amount of personalization
- number of mta child processes
- the pipe (or network bandwidth)
- the sending IP reputation
- the size of the emails
- number of available CPUs for MTAs
- load on the database at the send or speed of the execution database in the case of Mid-sourcing.
Based on all these factors, your throughput can vary a lot, from example from 200k emails/hour for extremely personalized deliveries with low bandwidth to 1000k or greater.
Building a good reputation for your IP is also very important.
Hope this helps,
Florent.