No. We recommend creating list segments that breakdown your leads into specific categories. We often separate leads that are actively involved with our email and are continually opening our emails and clicking on links. You can breakdown your leads into whatever segments that make sense for your company. Perhaps you want to target smaller companies with a specific campaign and then use a different campaign for your larger leads. The possibilities are endless. A word of warning, don't make it over complicated. You are likely to abandon the effort if it becomes to troublesome. Or you can simply hire use to manage email campaigns for you. :-)