Subject Line Secrets: How to Get More Email Opens
Your email subject line is your first impression—and often your only chance to win a click. No matter how good your content is, if your subject line doesn’t grab attention, your message won’t even be opened.
Think of subject lines as the “headline” of your email. They need to spark curiosity, show value, or make readers feel like they must open the message. In this article, we’ll break down key strategies for writing subject lines that increase open rates.
1. Keep It Short and Sweet
Most people check email on mobile devices, where long subject lines get cut off. Aim for 40 characters or less to make sure your message is fully visible.
Examples:
“Your Free Guide is Ready”
“Last Chance: Sale Ends Today”
If it’s too long, your subject may lose impact or look unprofessional.
2. Use Action-Oriented Language
Start with a verb to instantly create momentum and excitement. Think of it like giving the reader a direct command that’s hard to ignore.
Examples:
“Unlock Your Exclusive Offer”
“Discover 5 Easy Ways to Save Time”
Action words increase energy and engagement.
3. Create Curiosity
Leave just enough information out to make readers want to know more. Curiosity-based subject lines work because they spark interest without revealing the full story.
Examples:
“You Won’t Believe What Happened Next”
“This One Change Increased My Sales 3x”
Make sure the email delivers on the promise—clickbait that disappoints can hurt your brand.
4. Use Numbers and Lists
Numbers help your subject line stand out and set a clear expectation for the reader. Lists are easy to scan and imply quick, useful info.
Examples:
“7 Tricks to Improve Your Email Open Rate”
“Top 3 Tools Every Marketer Should Know”
Odd numbers often perform better than even numbers.
5. Personalize the Subject Line
Including the recipient’s name or specific interests can dramatically increase open rates.
Examples:
“John, Your Free Course Starts Today”
“Here’s a Deal Just for You”
Personalization builds a sense of connection and relevance.
6. Use Power Words and Emotions
Words that trigger emotions—whether excitement, urgency, or fear of missing out—can make your email irresistible.
Examples:
“Urgent: Your Bonus Ends Tonight”
“Exciting News About Your Account”
“Don’t Miss This Opportunity”
But avoid being too aggressive. Emotional appeal should feel natural.
7. A/B Test Different Subject Lines
Don’t guess—test. Send two versions of the same email with different subject lines to a small portion of your list. Whichever gets more opens becomes the winner.
Over time, A/B testing helps you understand what tone, structure, and keywords your audience responds to.
8. Avoid Spam Triggers
Certain words or punctuation can make your emails land in the spam folder. Avoid all-caps, excessive exclamation marks, or overused phrases like “Buy now,” “Free!!!” or “Make $$$ fast.”
Keep it clean and professional while still being attention-grabbing.
Final Thoughts
Your subject line is the key to a successful email campaign. With just a few words, you can capture attention, set expectations, and drive action.
Use short, clear, benefit-driven subject lines. Spark curiosity, personalize where possible, and always test what works. A great subject line leads to an open, and an open is your first step toward a conversion.