Why finding a balance between inspiration and perspiration is key to success in email Thomas Edison is credited with saying: “Genius is one per cent inspiration, ninety-nine per cent perspiration”. In email marketing, send volume is the workhorse of your campaign, it carries the burden and delivers the critical volume of sales needed for success. However, the workhorse depends upon being driven in the right direction. Segmentation, targeting and recency are the tools needed alongside the workhorse to strike the balance of inspiration and perspiration for email marketing genius.