Nearly all free email services have inbox ads, so there’s that most services include. Since they’re all but unavoidable, look for services that make them less obtrusive. Some place ads to the side, so they don’t create too much distraction. However, some services place ads all around the inbox, making it difficult to navigate the program. Some free email services even allow pop-up ads that cover your inbox and require you to click out of them to access your messages.
We also love how consistent the design of Uber's emails is with its brand. Like its app, website, social media photos, and other parts of the visual branding, the emails are represented by bright colors and geometric patterns. All of its communications and marketing assets tell the brand's story -- and brand consistency is one tactic Uber's nailed in order to gain brand loyalty.
dotmailer is a marketing automation platform that empowers B2B, B2C and e-commerce businesses. The software enables marketers in 150 countries to use advanced data to design, test and send powerful automated campaigns. In addition to being a Magento Premier Technology Partner, dotmailer integrates seamlessly with other ecommerce platforms and CRMs.