The nature of using email for inbound marketing means that your leads are warmer as they have greater intent and interest in your business. It also means the Return on Investment is higher and costs can be lower as inbound email lists tend to have lower subscribers.
When you create an email campaign, the key metrics for success are the growth and quality of the subscriber list. You should look at creating lists that are segmented by type. That can be by audience, preference, or category but avoid putting every contact into one pot and hoping it will work!
