The etiquette of email subject lines

Depending on what year it is, and what source you’re looking at, it is reported that more than 3 billion emails are exchanged each day. 

Because subject lines are like book titles, and we know the old “don’t judge a book by its cover” expression, emails are judged and, therefore, opened based on who sends them and the subject line. 

As a result, sending interesting, catchy and informative subject lines are critical; after all, it is the first impression for that day of you, your brand, your product or service and, absolutely, your connection.

Here’s a timely to-do list for subject-line success:

Do use a subject line. Blank subject lines are like calling someone and not leaving a message.

Do be honest and not misleading. Clickbait gets you sent to email jail, aka spam, junk or, worse yet, the blocked email list. 

Do focus on the subject line being 50 characters or less, ideally.

Do capitalize each word of the subject line, as this is similar to a book title. Don’t capitalize every letter in each of the words, as that is screaming at someone.

Do check your subscribers to ensure whether or not your email subject line will be translated into another language, and if so, ensure you are not being inadvertently offensive or inappropriate.

Do consider making subject lines based on segmentation of your teams, clients/customer, targeted prospects and others, and make the subject line relate to the area, segment and type of reader.

Do skip special characters (such as asterisks, at signs, pound signs, exclamation marks) and other “expressions,” since many service providers see them as an attempt to phish or spam. 

Do go ahead and use emojis, occasionally, as they are not considered special characters. (This is very new to most platforms).

Do change the subject line on a reply if something is being added, or omitted, in the response.

Do send an email of appreciation occasionally with a subject line of “Thank You for Being a Client/Subscriber/Top Client/Top Engager” with some statistics about your engagement with them. People like to be a part of successful practices.

With intriguing and true subject lines, watch your opportunity for opens to increase and for unsubscribes, deletes and blocks to decrease. After all, with billions of emails being sent each day, the subject line is your “book’s cover. You want yours opened and you want it read. 

Debbie Lundberg is the founder, and CEO, of the Florida-based firm, Presenting Powerfully. She is a 12-time published author, certified virtual presenter, certified life coach, certified leadership coach and certified image consultant. She co-hosts the Business Of Life Master Class podcast. Her book, Remote Work Rockstar, has become a guide for working and leading virtually.

You May Also Like
Halftime strategy: 6 ways to reignite your sales performance

Don’t look now, but 2025 is already halfway in the books. Whether you and your sales team are ahead of target, stuck in a slump or somewhere in between, the second half of the year is your moment to reset, refocus and rally. Summer isn’t the time to coast—top performers know there is no off-season

Read More
How to stay productive through the ‘slow season’

For many sales professionals, June brings vacations, kids home from school, well-deserved time off, inevitable thunderstorms, and a notable dip in activity. Prospects are harder to reach, decision-makers are out of the office and the usual pace of business slows down. But the so-called “summer doldrums” don’t have to mean a loss in momentum, productivity

Read More
Crushing imposter syndrome like a boss

What is the difference between the best compliment you’ve ever received and the best compliment you’ve ever received but didn’t believe? The difference was likely you. The difference was likely what you allowed—or didn’t allow—to become part of your experience. It could be Imposter Syndrome.  Imposter Syndrome, recognized since the 1970s, is a psychological pattern

Read More
A Lesson from an “Old School” Seller

  … on Engaging Effectively in the AI era That’s the biggest stereotype some people have about the “typical salesperson”? It could very well be the one-dimensional schmoozer depicted in movies, or television, many years ago. Pushy. Fast-talking. Fixated solely on closing the deal. Not always completely honest. But it’s not a stretch to say

Read More
Other Posts
Consider this your reminder: Administrative Professionals Day is April 23

This year marks EA Direct Connect’s fifth-annual luncheon, where we honor Central Florida’s administrative professionals with exceptional food, drinks, camaraderie and swag. At EA Direct Connect, we deliver the best experience because we understand, as former administrative professionals, that executive and administrative assistants often “eat last.” Once again, we will return to The Tampa Club.

Read More
Ask the Experts: Crafting an action plan for poor sales performance

Don’t look now, but we’re already into the second quarter of 2025. The first quarter is in the books and, if you’re like most sellers and sales leaders, you probably fall into one of three categories: Your year got off to a great start and you’re on track to set billing and revenue records. You’re

Read More
March is the time to reflect on your sales strategies

March Madness is a well-known term in sports, signifying the NCAA college basketball tournament — a thrilling, single-elimination, winner-take-all event. Beyond the basketball courts, March also brings the excitement of Major League Baseball’s spring training and Opening Day, as well as the promise of warmer days ahead. However, “March Madness” can also describe erratic behavior

Read More
Ask Debbie Lundberg: Savy, Single and Sick of Questions

Hello Debbie! In February, many of my work, and personal, interactions had people asking me about my relationship and sometimes the inquiries were difficult to address.  As an introvert who enjoys down time, and someone who happens to be single right now, these two questions are challenging, and I’d like mindset coaching and responses that

Read More