How To Write Email Subject Lines That Actually Get Opened

Your email subject lines have one job: convince someone to open your messages.

You can spend hours crafting the perfect email, but if your subject line doesn’t grab attention, your audience may never see it. Inboxes are crowded, and people make split-second decisions about which emails deserve their time.

The good news? You don’t need clickbait or gimmicks to improve your email open rates. You just need a strategy.

Why Email Subject Lines Matter

Email subject lines serve as the first impression of your message. They influence whether recipients open, ignore, save, or delete your email.

Strong email subject lines can:

• Increase open rates
• Improve engagement
• Drive more website traffic
• Generate more leads and conversions
• Strengthen relationships with your audience

Keep It Short And Clear

Most people check email on their phones. Long subject lines often get cut off before readers can see the full message.

Aim for 30 to 50 characters whenever possible. Focus on communicating value quickly, as clarity beats cleverness every time.

Examples:

• 5 Ways to Improve Your Website Today
• Ready for a Better Marketing Strategy?
• Your Monthly Marketing Insights

Lead With Value

Ask yourself one question before writing a subject line:

“What’s in it for the reader?”

People open emails when they expect something useful, interesting, or relevant. The second option tells readers exactly why they should care.

Instead of: Company Newsletter July Edition

Try: Marketing Trends You Can’t Ignore This Month

Create Curiosity Without Being Misleading

Curiosity can increase opens when you use it responsibly. The goal is to give readers enough information to spark interest while leaving room for discovery.

Examples:

• The Marketing Mistake Costing Businesses Leads
• One Website Update That Improved Conversions

Avoid making promises your email can’t deliver. Misleading subject lines hurt trust and increase unsubscribe rates.

Personalize When It Makes Sense

Personalization can help your email stand out in a crowded inbox. However, you want to use personalization strategically. Forced personalization often feels unnatural.

You can personalize subject lines using:

• First names
• Company names
• Industry references
• Previous interactions

Examples:

• Sarah, Have You Seen These Marketing Trends?
• Ideas for Growing Your Manufacturing Business

Use Action-Oriented Language

Strong verbs encourage engagement and create momentum.

Compare these examples:

• Marketing Report Available vs. Download Your 2025 Marketing Report

The second example gives readers a clear action and benefit.

Words like discover, improve, learn, increase, build, and unlock often perform well because they communicate value immediately.

Test Different Subject Line Approaches

No audience behaves exactly the same way!

That’s why A/B testing remains one of the most effective ways to improve email performance. It allows you to track your results and look for patterns over time. Small improvements can lead to significant gains.

Test variables such as:

• Length
• Personalization
• Questions versus statements
• Numbers
• Urgency
• Benefit-focused messaging

Avoid Spam Triggers

Certain tactics can reduce deliverability and hurt open rates. Professional, trustworthy subject lines perform better in the long run.

Avoid:

• ALL CAPS
• Excessive punctuation
• Misleading claims
• Overuse of promotional language

Examples to avoid:

• OPEN NOW!!!
• FREE MONEY TODAY!!!
• ACT IMMEDIATELY!!!!

Focus on Your Audience

The best email subject lines prioritize the reader’s needs. When you focus on helping your audience, higher open rates often follow naturally.

Before you hit send, ask:

• Does this solve a problem?
• Does this offer value?
• Does this create interest?
• Does this match the email content?

Start Improving Your Email Subject Lines Now

A great email subject line doesn’t need to be complicated. Keep it clear, valuable, relevant, and audience-focused. Small changes can lead to more opens, more engagement, and better email marketing performance.

Need help improving your email marketing strategy? Contact 1Eighty Digital today to learn how we can help you create campaigns that drive measurable results.

Frequently Asked Questions

What is the ideal length for email subject lines?

Most experts recommend keeping email subject lines between 30 and 50 characters. Shorter subject lines often display better on mobile devices.

Do emojis improve email open rates?

Emojis can increase visibility in some industries, but results vary by audience. Test them carefully to determine what works best for your subscribers.

Should I use personalization in every subject line?

No. Personalization works best when it feels relevant and natural. Overusing it can reduce effectiveness.

How often should I A/B test email subject lines?

You should test subject lines regularly. Consistent A/B testing helps you identify trends and improve performance over time.

What makes a good email subject line?

A good email subject line communicates value, creates interest, stays relevant to the reader, and accurately reflects the email content.