The 9 Best Email Subject Line Styles to Increase Your Open Rates


How many unread emails do you have in your inbox? 300? 800? Or maybe, if you’re like me and are on countless mailing lists, 2,644? And that’s after a little Gmail spring cleaning!

We get a TON of emails every day (105 billion are sent every day!), and a lot of them are never opened. People are inundated with boatloads of information – more than ever before in history! But we don’t have more time to soak it all in. The chances of your email being ignored are pretty high – unless of course, you have a rockin’ sockin’ subject line.

business email subject lines

Your subject line is your first (and maybe your last) impression on users. In many ways, your email subject line is more important than your email body. After all, a great newsletter is worthless if it never sees the light of day.

There are a few different schools of thought when it comes to creating slam dunk subject lines. We’ll be covering 9 different types of effective email subject lines and sprinkling examples throughout. Because more opens means more online sales.

1. Simple, No Nonsense Email Subject Lines

There’s a lot to be said for minimalism – users need you to be clear and concise in your subject lines, as time is always an asset.

MailChimp conducted an email subject line study and found that short, descriptive subject lines fare better than cheesy lures. Some might bristle up at the accusation that humor and creativity should take a back seat when creating good subject lines for emails, especially since many marketing experts say otherwise. It’s worth noting that this succinct approach is most applicable with notification emails, in which a user already has a connection with the content you’re delivering.

great email subject lines

good email subject lines

Most of these subject line examples involve updates or notifications connected with a user’s social media activity, order status, etc. These emails have a specific purpose, and so their subject lines should be specific as well.

2. Funny Email Subject Lines

A humorous subject line can really stick out among the dry, dull emails surrounding it. Humor it a touchy thing though – it thrives on exclusivity, which isn’t always great if you’re trying to appeal to the masses. However, if you know your audience well and your emails are targeted, a well placed joke can get your email opened and can earn major reputation points with folks on your wavelength. 

Some funny email subject line examples:

  • Please Touch Me! Enterprise Delight via Multitouch
  • Defense Against the Dark Arts: ESAPI
  • Do Gamers Dream of HTML5 Sheep? 
  • LEAN STARTUP: Baby Got (Feed)Back - Putting the Lean in Learn

The “touch me” line is a chuckle that will be understood by most readers, but the cleverness of the other funny email subject lines might be lost on some users who didn’t attend Hogwarts or haven’t taken their Voight-Kampff empathy test. But if you can recite every line of Sir Mix a Lot’s Baby Got Back word for word…like some of us can… you’ll love that “Lean Startup” subject line.

Note: The awesome email subject lines above and several text subject lines below are borrowed from this ClickZ article, full of many great examples.

3. Controversial/Shocking Email Subject Lines

Controversy (sometimes) sells, and it most certainly grabs attention. Using shock, controversy, or insult in your subject lines requires you to tread really carefully. You may get opens, but at the cost of customers. This strategy requires you to be confident in your understanding of your audience’s tastes and perceptions. It’s a bit of a gamble, but the pay-off can be pretty great – would you simply gloss over the subject lines below? Not likely.

  • Everyone Is Gay: Social Media As Social Action
  • Why Your 5-Year-Old Is More Digital Than Most CMOs
  • Your Marketing Sucks: Why You Need to Think Local

4. Single-Word Subject Lines

One effective email subject line strategy involves going ultra-minimalist with one-word subject lines. Let’s take a peek at the promotions tab of my Gmail. The promotion tab is scheduled for a major makeover – Google is starting to display promotional emails in a image-oriented design inspired by Pinterest. If this new setup sticks, pictures will usurp subject lines as the pivotal email element.

subject lines for emails

Until then, we still need to worry about the current state of the promotions tab. It’s chock full o’ mess, with stacks upon stacks of unopened emails. Which one stands out? For me it’s Amazon Local’s M3 subject line.

effective email subject lines

From a simple design perspective, you can see why the Amazon Local subject line catches the eye – its length and shape stand out from the other largely similar-looking structures.

Another great email subject line example comes from Mequoda with the simple subject line of:


It’s just a single word, but it’s an emotionally huge one. What should I be panicking about? Am I in danger? What’s going on? Am I having an existential crisis? Emotionally-walloping words make a big impression.

5. Email Subject Lines with Numbers & Lists

Many of the factors that make up a good blog post title also make a good email subject line. Incorporating numbers into your subject line attracts attention, as our brains are naturally drawn to digits. This tends to be why top 10 lists are so successful – lists are easier for our brains to process and they create curiosity, in addition to providing the promise of a quick and easy read.

subject line tips

email marketing subject lines

top email subject lines

Numbers and list email subject lines stand out for the same reasons that one-word subject lines or unusual punctuation do – they are visually jarring. An article at The New Yorker discusses our avid adoration of listmania:

“Whenever we’re scanning the environment for nothing in particular, our visual system is arrested by the things that don’t fit—features that suddenly change or somehow stand out from the background. A headline that is graphically salient in some way has a greater chance of capturing our eye, and in an environment where dozens of headlines and stories vie for attention, numerals break up the visual field.”

Basically, the ultimate goal is to make your email subject line visually stand out. How you do that is up to you!

email subject lines that get opened

XKCD's comic, "Headlines"

6. Personalized Subject Lines

Incorporating personalization techniques into email subject lines is another way to increase open rates. By personalization I don’t mean incorporating a user’s name into the subject line – this has become so common practice that many users glaze over these as spam. Instead, try location-specific offers and language, or interest targeting. LivingSocial and Groupon are old pros at this, sending emails with subject lines promoting deals in your area.

best subject lines for emails

LivingSocial also sends me emails about deals I looked at but didn’t end up buying by utilizing the very effective but always semi-creepy remarketing strategy. LivingSocial also sends me new deals based on my past purchases. I’ve bought a few Paint Nite and pottery deals in the past, so art-related offers are the ones I see most often in my inbox. They’ve got my ticket alright!

email subject line best practices

The subject line above combines personalization (via remarketing) with scarcity to create an effective email subject line. Brava!

In a broader sense, it’s good practice to understand your audience well enough to know what language, style, and offers will be attractive to them.

email subject lines examples

catch email subject lines

funny email subject lines

Thrillist knows exactly who their audience is – the young, drinking crowd – and their conversational tone fits perfectly here with their fun email subject lines.

good subject lines for emails

Thrillist knows their audience. Photo courtesy of Bem Devassa.

Thrillist is doing a ton of other stuff right too; they’ve got lists, localization, and pay tribute to a holiday. Who doesn’t want to impress their buddies with fun Guinness facts on St. Paddy’s?

7. Questions & Other Punctuation in Email Subject Lines

Question marks and unusual punctuation offer another method for standing out from the email masses. Exclamation marks can be useful, but are so over-used in subject lines that they don’t tend to be very powerful. Instead, experiment with some fun symbols or loud punctuation to attract ‘dem eyeballs.

great email subject lines

best email subject lines

how to write subject lines

Asking your readers a question, as opposed to a standard statement, immediately engages them. Questions enter an instant dialogue with users, making them more likely to be opened.

successful email subject lines

professional email subject lines

Above, Banana Republic combines a question with scarcity tactics. Sephora asks an emotionally-engaging question (really? you care?) with just two words, creating a truly great subject line.

8. “Missing Out” & Other Scarcity Tactics in Subject Lines

We have a deep, inherent terror of being left behind, of missing out – that flock mentality was a survival instinct once, but now it’s just another subject line strategy to goad us into a purchase. Email subject lines threatening scarcity (limited time offer!) tend to perform well, and this language is also common practice with squeeze pages. People will commit some pretty cold actions to avoid “missing out.” Yup, we’ve all got a serious case of the FOMOs. Throw in some scarcity words and you may be surprised how your click rates will change.


writing great subject lines

best subject lines

Examples above incorporate numbers, scarcity, punctuation, and partial capitalization (emphasis on the partial) for some serious subject line success.

9. Mysterious Email Subject Lines

As Scooby-Doo or Sue Grafton can tell you, people dig a little mystery in their lives. Giving readers a little taste of something intriguing might cause them to bite.

mysterious email subject lines

Email Subject Line Best Practices

Some general good email subject line best practices to keep in mind when crafting those lures.

  • Write multiple subject lines. You should write 10 subject lines for every email, just as you should write 10 titles for every blog post. Then choose the best
  • Keep it under 50 characters. It’s general best practice to keeps subject lines to fewer than 50 characters. Subject lines with less than 50 characters have higher open rates and click-through-rates than those with 50+. Go over 50 characters and you risk being cut o-.
  • Alliteration. An ample amount of alliteration attracts! Give it a try for some catchy email subject lines.
  • More caps More opens. Covering your subject line in caps WILL NOT HELP YOU. Caps are powerful, but not to be trifled with. Use them sparingly and responsibly, like grenades.

email subject lines best practices

  • Know your audience. Your best bet for creating good email subject lines will be understanding your audience intimately and catering to them. This is a major rule for pretty much all aspects of online marketing, and while it can be a bit tougher in a limited character field like a subject line, matching your audience’s interests and mannerisms is essential if you really want solid open rates.
  • What’s your tone? Most good email subject lines rely on a conversationalist tone to attract readers. Sites like BuzzFeed and Upworthy, known for their super-successful clickbait headlines, take advantage of a casual, conversational tone.
  • Call to action. It’s never a bad idea to try a call to action in your email subject line. While many opt-out due to limited character space, call to actions may improve open rates.

call to action in subject lines

Even a simple “Go!” can serve as a motivating call to action. If you're not sure what makes a great call to action, check out this post on call to action examples by Dan for some help.

  • Using You/Your. While name-calling is on the out, it’s still considered a best practice to use “you” and “your” wording to speak directly and comfortably with readers.
  • Put Yourself in the “From” field. Keep your “from” section professional and consistent for business subject lines. This isn’t this place to be a goof ball – with so much spam floods, users want to see that you are a legitimate and trusted source. Most business emails put their brand name in the “from” field, or go with something along the lines of “John Smith from InvitaCorp”.
  • Always A/B test subject lines. I must sound like a broken record – I know, I know, A/B testing blaa  blaa, so important, blaa blaa. Well it is! You should A/B test everything you can get your keyboardy fingers on, email subject lines included.
  • Pay attention to the preview. The email preview that follows the subject line is a valuable piece of property, and yet so many businesses ignore it or let it get filled with garbage text.

Doing it right:

using email preview

Doing it wrong:

email preview

the top subject lines for emails

Many emails have text like this or something similar because they want the option to view in web browser for those reading on mobile devices. Instead, move the “view in browser” links and other mumbo-jumbo to the bottom of the email so you can make the most of the preview field.

  • See something you like? Steal it! All the world’s greatest artists are thieves – they “borrow” from others, building on existing works to create their own. Don’t be afraid to break bad. If you see great subject lines that you think will work for your business, nab them! Tweak them a bit and try them on for size. Remember, imitation is flattery, so flatter the hell out of the best email subject lines.

Why Do My Open Rates Suck?

Having trouble with your email open rates? Working on your subject lines will help, but there may be other factors at play, such as:

  • Is the email viewable? If your email doesn’t read well on a user’s device, they won’t bother trying to decipher it.
  • Are you being a pest? If you’ve been emailing folks every day, they may be fed up with you and won’t be as likely to open your emails if you’ve been making yourself an annoyance.
  • When did you send it? Many people don’t check their emails as often on the weekend. Check out our post on the best times to send an email newsletter.
  • Quality of your email list. Is this a solid, targeted email list? If your list isn’t high-quality, it may reflect in your open rates.

Hopefully we’ve given you the information you need to make email subject line eye candy. These tips should help with open rates, but retaining those readers? That’s up to you!

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Mar 31, 2014

Great tips! Personalized subject lines are an underrated way to entice people to open. Making a list of what to check is good, but there is a great company for helping with all of these tips automatically. It's called Email Opened. They have an automated system that has real-time analysis for subject lines, email body score, send time, and more. Basically anything your unsure of, it will tell you a score as your building your email based on data they have and an industry standard.I have tried most of the big email marketers out there but find this one to be the easiest to use. It's nice to have something automatically analyze your email as your making it. Worth checking it out!

Megan Marrs
Apr 24, 2014

Very cool, thanks for letting us know!

derma roller do twarzy
Oct 06, 2015

Keep on working, great job!

Jun 13, 2016

Hi, Thanks for recommending this automated tool. I will definitely try it for my next campaigns of MailGet.

Apr 10, 2014

I agree with you, Megan.Our email subject line would perhaps be more important than our email content, in most cases. Sometimes, I get tough time in composing subject lines to attract my readers. Thanks for sharing these few different types of effective email subject lines. I’m now free of struggling just to be able to craft my subject line for emails. I found this article really helpful.Nice post!Btw, found this post shared on

Megan Marrs
Apr 24, 2014

Glad you found it helpful!

Apr 16, 2014

So you linked back to the source of the Flikr photo you used, but you can't even mention where that XKCD comic came from or link back to anything but your own article? Then again, I don't know what I'm expecting from someone writing on "". Surely I don't have to explain to you why it's important to link to your sources. If you know anything about marketing at all, which I assume you know at least a *bit*, you understand why it's a slight on the person whose work you're ripping off and featuring with your own. If Randall Munroe were anyone but a fantastic person, he could sue you for image copyright infringement. Do you know what intellectual property means?  

Megan Marrs
Apr 24, 2014

Woah, reel 'em in cowboy. Obviously since I sourced the Flikr photo I believe in giving credit where it's due. Sometimes captions get lost in the translation and things get overlooked. Thanks to staunch observers like yourself I could never get away with claiming an XKCD article as my own, and I never would. You'll be happy to see I've added a link to the original comic so you can rest easy now.

May 01, 2014

Really enjoyed reading your suggestions, very helpful, I find it really difficult to write enticing subjects so this has been a huge help!

May 02, 2014

Thanks for a terrific overview of best practices!

Megan Marrs
Jun 11, 2014

You are most welcome! 

May 10, 2014

Thank you for the awesome post. I really did enjoy it! Thank you again for your fresh ideas.

May 27, 2014

I had days looking to develop a solo ad effectively,, this is the most precise and clearexplanations of all, thank you for sharing it's very helpful to me. will comment about you on my blog. 10Q Demian :-) 

Megan Marrs
Jun 11, 2014

Aw, thanks so much for the kind words.

May 31, 2014

Really helpful information.  This helps me narrow down how to write subject lines that fit my clients.  Thanks.  

Shamsul Duha
Jun 18, 2014

Thank you for this helpful post! Appreciate it greatly :)

Omkar Udas
Jul 13, 2014

Hi Megan,I really like the way you have classified subject lines up there. Especially the one word subject line is interesting :) Will definitely try testing it.Here's an article on how to benchmark Email Open Rates Hope you find it useful. Regards,Omkar 

Emma Watson
Sep 09, 2014

Very informative blog. Email is a part of online marketing. So it should follow a certain criteria like you said the title, title must be compelling and unique to which everybody will atract. Thanks for the great tips. It's very helpful. 

James Croom
Sep 25, 2014

This blog is really nice and informative. Thanks for sharing.

jacob wallace
Sep 26, 2014

I pay a quick visit each day some blogs and websites to read posts, however this blog provides quality based posts. 

Alyssa K
Oct 21, 2014

What tools to do you recommend to A/B test email subject lines?

Elisa Gabbert
Oct 21, 2014

Your email marketing software probably provides the capability to split a list into test groups.

Ravi Shah
Oct 28, 2014

Very intriguing and thorough article, Megan :) A lot has been said about subject lines and what works best for them! Amidst that this article throws a lot of light on the various types of subject lines. Funny or informative subject lines tend to get more attention. Lately tweet-able subject lines and using powerful words that conquer open rates have been trending! 

Jun 30, 2015

I'm a copy writer and until I learned that the email subject line is such an important hook, I was missing the boat.

You are right on target with this and I will say this for anyone who is serious, always keep learning, it will pay off in the end.

Gail Cavanaugh
Nov 08, 2015

This was very helpful. My open rates have improved over the last two years. I will try some of theses hedalines to increase it even more. These were great ideas!

Jan 11, 2016

Good post! Out of these 9 Email subject line styles, I personally like the "personalized subject lines.Very effective! Thank you for sharing!

proud feminist shirt
Jun 30, 2017

This article will help the internet people for setting up new website or even a blog
from start to end.

Jan 23, 2016

yes, all subject lines mentioned we eye catching and can be helpful increasing open rates i can use them according to my niche..thak you for sharing it!

Mar 02, 2016

I enjoyed reading this so much I'm ashamed to say I was sad when it ended, I wanted more! This was both informative and really amusing, I like your style of writing as well as how clearly it was laid out. Thanks for the information, I'm hoping it will help me in my internship interview tomorrow. As you can probably tell I'm quite nervous as I'm writing comments on random articles that make me laugh at 11.45pm the night before...

Gulfam Shabbir
Jun 21, 2016

A lot depends on what time of the day you are sending the email. Usually the emails are opened from less than 1 to a maximum of 12 hours from the time they are sent. Keeping in view the time the email would be probably opened and then syncing your subject line with the date, time and what is a hot topic at that place at the specified time drastically improves the open rate.

Van Anh
Aug 04, 2016

I love it, it's so useful for me

Luiz Centenaro
Oct 18, 2016

Fantastic tips here Megan! I absolutely love the 1 word example.

As long as you have preview text that adds context rather than "View Email in Your Browser" Or have the image pull the alt text it's a perfect way to stand out!

I'd follow you on Twitter if you didn't tweet so much about politics ;)

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