More than 122 billion emails are sent every hour, demonstrating that email is a powerful medium that will continue to be a reliable method for companies to gain and retain customers.

With that staggering statistic in mind, marketers must master the art of engaging content when competing with a cluttered inbox.

Unfortunately, some marketers still dilute ROI by engaging in email marketing practices that are hurting business.

When refining your email marketing strategy, consider leaving these deadly practices behind.

1. Hiding Opt-Outs
2. Designing for Desktops
3. Neglecting Visuals
4. Forgetting About Social
5. Ignoring Lead Generation

Read more: Five Email Marketing Practices That Need to Die