Hit ENTER after each Tag to add it to your post; Numbers in parentheses represent the Tag's usage.
under Throttling, it says:
- Outgoing Messages per Hour - The number of messages sent by the domain per hour. By default, the number of outgoing messages is 5,000.
I'm thinking that it should refer to 'user' instead of 'domain' and the number should be 1000 or 1500.