We limit outgoing email rates to 200 emails per hour on our shared and reseller solutions to keep the pending mail queue as clear as possible. This allows us to keep the server from being heavily loaded with email messages, and to prevent spam listings and realtime black listings that affect everybody on the server.
Should you need to send more than 200 emails per hour we can try and facilitate this although we would need some form of justification as to why you need to send more than 200 e-mails per hour on our shared platforms.