Why do I have to Split my list? And what does it mean to warm up my IPs or throttle my emails?

When you first upgrade your account to a High Volume Sending Plan, there will be new dedicated IP(s) assigned to your account. Dedicated IP’s are designated to you to ensure that your email deliverability is independent of any other Benchmark account. To learn more about Dedicated and Shared IP’s Click Here. Anytime you start sending from a new IP address, precautions should be made such as warming up the IP.