While some customers are happy on our shared IPs, others prefer the benefit of dedicated IPs, which give you more control over your reputation and deliverability. One dedicated IP is included with Foundation 100k, Growth and Scale plans. The number of dedicated IPs you need depends on your volume and the types of emails you send. In general, we recommend one IP per 1,000,000 emails per month, but there are definitely other factors that come into play as well. You can add additional IPs to your account for $59/IP/month from within the control panel or by contacting support.