Writers can improve the overall efficacy of their marketing campaigns by understanding the 5 T's of great content for emails. 1. Tease. Tease the content of the email in the subject line to entice users to open it.   2. Target. Reach your target audience by customizing your content to each email list. If you haven't already, your audience should be segregated by important factors like job title, department, and even age, sex, and hobbies.    3. Teach. Make sure your email newsletters include actionable content that your client's employees can begin using right away.  4. Test. Split test different subject lines, hero images, content, formatting, headings, and colors to find the best combination that generates the highest click-through and open rates.  5. Track. Track how well your email newsletters are doing by checking your metrics and sending employee surveys. This information can then be used to tailor your next newsletter to generate even better results.