Cai Ellis's Articles
Newsletter Subject Line Examples: 458 of the Best Ideas and Trends
Writing a newsletter is difficult enough. Coming up with a fun and catchy newsletter subject line that will...
What is the average ROI on Email Marketing 2026? And other ROI statistics
Key findings: On average, every $1 invested in email marketing generates $36 in return (a 3,500% increase) In...
Dynamic Content in Emails: The secret sauce of personalized email marketing!
You’re probably reading this because you want to start using personalization strategies in your email campaigns. Why? Because...
Average Email Deliverability Rate in 2026 (And other deliverability statistics)
At EmailTooltester, we’ve always recognized the importance of measuring email deliverability, which is why we’ve been running deliverability...
How many emails are sent per day? (Fresh data for 2026)
Key findings: In 2026, 392.5 billion emails are sent every day. By 2027, 408.2 billion emails will be...
How many email users are there in 2026?(And other email usage statistics)
Key Findings: There are 4.73 billion email users worldwide in 2026, meaning 57% of the total world population...
Targeted Email Marketing: The right email, to the right person, at the right time
In an ideal world, all your contacts would engage with every email you send. After all, they consented...
Email List Management: How to Keep Your List Clean and Healthy!
Email list management can be a nightmare… The money spent offering freebies (lead magnets) in exchange for email...
Types of Email Marketing: 15 campaigns you could be using today!
What’s the best type of email marketing for businesses? Newsletter, promotional, or lead nurture emails? Well, the answer...
