As a company, you want to create memorable experiences across every customer touchpoint. The emails you send are a key touchpoint. Too many emails and the customer will get annoyed with your company and file you as spam. Poorly designed emails won’t reflect well on your company and the products you offer. And with more people viewing their emails on mobile, it’s imperative that your mobile emails look flawless across multiple devices.
Via Brian Yanish - MarketingHits.com