Your email list is a valuable asset. When a user subscribes to your list, they go out of their way to establish a direct connection with your company. Subscribers are users who are convinced and have bought into, your brand. One could argue that a sense of belief and trust lies between a subscriber and a brand. But we will not bore you with the psychology.
With great strategy and careful execution, come great email marketing campaigns. Your copy in your email should be helpful, light, and to the point for both B2C and B2B audiences. A mindful marketer understands that even customers have busy lives.