we limit our clients to 100 emails per hour.
Because they purchased mailings list it does not say those on these lists gave permission to be on these lists.
It could be a few weeks before spam reports get noticed and then your upstream provider will suspend your servers for sending spam, which would effect all your clients.
i would invoke your clause 91
also on here you state 'I have a hard restriction of 250 per hour' and yet your clause 92 states
You agree and understand that we have set a limit of 500 outgoing emails per hour on shared and reseller hosting, 500 outgoing emails per hour on VPS Hosting, 1000 outgoing emails per hour on Cloud Hosting and 3600 outgoing emails per hour on Dedicated Hosting to avoid any sort of email spamming from our servers. Customers cannot send more than the specified number of emails in an hour irrespective of the size of their mailing lists.