Today email plays a crucial role in establishing and maintaining business relationships, both within a company and with external contacts.This paper attempts to propose communication strategies leveraging behavioral sciences bases on a case study of a company that serves as an intermediary between companies and mystery shoppers.The proposed strategy aims to generate more mystery shopping task completions and new shoppers’ signups through improved communication (primarily through emails) between the intermediary company and mystery shoppers. The improvement of communication is executed through a redesign of the company’s current email communication which can be tested through potential experiments. Prior to this, survey design is proposed to better inform the redesign of the company’s current email communication and general advice given to the company to achieve its paramount goal i.e. more mystery shopping task completions and new shoppers’ signups.