In a December 2008 Datran Media survey of 3,000 marketing executives from Fortune 1000 companies, 80.4% of respondents identified email as the strongest-performing advertising channel for their brands, and 82.4% said it helps increase sales through other channels.
For companies interested in generating similar results, the first step is to improve open rates through the use of effective subject lines.
We asked DJ Waldow, director of best practices & deliverability at Bronto Software; Ben Chestnut, cofounder of MailChimp; Dylan T. Boyd, VP of sales & strategy at eROI; and Greg Cangialosi, CEO of Blue Sky Factory, to weigh in on what makes a good subject line.
Here's some of what they came back with:
- Keep it concise, 35 characters or less, according to Cangialosi. "Longer subject lines will be truncated by some email clients," he said.
- Make it about the reader. Boyd suggests writing to the audience, not at them; keeping the customer lifecycle in mind; and personalizing the message based on profile or behavioral data. "Always pushing your sales agenda will reduce the open rate and conversion rate," he said.
- Make it actionable by providing a sense of urgency and a clear call to action (think verbs!). "Put the most important information and the key call to action first," recommended Cangialosi.
- Ensure your message is simple, clear, and informative. "If it is not simple, [is not] understood, and doesn't give a clear action or value, then it will be passed over," said Boyd.
- Avoid ALL CAPS and exclamation marks. "[ALL CAPS] feel like you are shouting for attention and not being respectful of your subscribers' time," said Boyd. Chestnut added: "If there are 100s of other emails in the inbox with subject lines screaming for their attention, sometimes whispering is the best way to stand out."
- Include your brand. "This is especially important if your company name (from line) is not that well recognized," said Waldow.
- Draw attention with buzz words like "Twitter" or "YouTube," said Waldow, who also offered, "I like to think about subject lines as headlines in newspapers. Does it catch enough of your attention to read on?"
For an idea of what works for us at MarketingProfs, here's a look at the Top 100 most effective subject lines from the MarketingProfs Get to the Point! Newsletters.

See whether any of these catch your attention...
- Potty All Night Long
- Four Blogs You Should Be Reading
- Seal Your Pitch with a Kiss
- Release Me Please!
- A Week at IKEA
- Twitter for Timeliness
- I See Riches on the Horizon
- Newsletter No-No's
- A Doctor Who Only Makes House Calls
- Widget for Dollars
- Did He Really Call It a 'Nymphomercial'?
- I Am McLovin!
- Playing Tag
- The Freeconomics of Online Media
- How Customers Are Like Lab Rats
- Sidle Up to the LiveBar
- The SEO Rapper
- Burger King Tells a Whopper
- Get 'em to Gawk
- A Coffee Klatch for Every Marketer
- Laugh 'Til You Cry
- Shameless Marketing Stunt
- A Super Bowl Strategy That Paid Off
- How Saying the Least May Achieve the Most
- Loaf Run
- Senior Makes Site Accessible
- Oh, Count the Ways You Can Annoy a Journalist
- Ranting and Raving
- Jingles 101 with Dinah Shore
- When Your Video Isn't Viral
- On-the-Fly Creativity
- Put That Checkbook Away
- Branding Tips from the Queen of Burlesque
- Time to Yelp!
- Get Over It, Kid
- Do You Have Peripheral Vision?
- Rules Schmules
- Create a Customer Walk-a-Thon
- Is Your Newsletter a Must-Read?
- Keeping Up With the Kremplers
- Subject Lines: Tell, Don't Sell
- Cool Open-Rate Stats
- Podcasting is Easier Than You Think
- Don't Be a Twit
- My Blog, Myself
- Think Small to Win Big
- Social Security Shenanigans
- Would Your Blog Get an A?
- A Resolution You Can Keep
- How to Measure That Long Tail
- You've Been Punk'd ... and Wiki'd
- The Cold, Creamy, Refreshing Story of Social Media
- The Wisdom of the In Crowd
- The Angel in Red Speaks to Us
- Glad You Could Make It!
- Springtime for Twitter
- Using Tricks of the Journalistic Trade
- We're Still Married to the Past
- I Like 'em Small and Focused
- Get Gored
- Will Dance for Gum
- It's Alive! It's Alive!
- No More Boring Conferences
- A Clearly Good Marketing Plan
- Yammer to Keep It Together
- Passengers: Your Captain Has Screwed Up
- Invite. Engage. Inoculate.
- The Slow Art of Customer Seduction
- How to Blow It in Five Words or Less
- Give 'em a Good Tease
- Taking the Email Plunge
- Analyze This
- The Deviant Approach to Creativity
- A Gentle Step into Web 2.0
- Sprechen-Vous Italiano?
- We're Short on Euphemism Today
- The Revolution Will Be Widgetized
- Inspiration from the Swat Team
- Why You Want Customers to Notice Your Zits
- Help Your Customer Live the Fantasy
- Remember Me?
- Pepsi's Scheme Fails Taste Test
- Mind Your E-Manners
- Time to Step Up Your Blogging
- Go Where the Current Leads
- Look at Me. Now CLICK.
- Warm Up Your Thinking Cap
- What You Can Learn From Starbucks' Mistakes
- Dumb It Up, People
- Those Jerks Are Talking About You. So Talk Back!
- How to Be a Better Blogger
- A Permission Marketing Primer: Picking and Choosing
- It's Time to Socialize, People!
- Stick to the Script!
- Loose Lips Sink Ships
- Customer Service the Lexus Way
- It's Talkification Time!
- Plurk It, Baby!
- The Cocktail Party Rule
- On Target
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These subject lines may also be good headlines for email newsletters used to nurture leads or retain existing customers. In general, they make great engagement copy.
Thanks, Kim!
I am sorry but I am a little disappointed with this article. Some of those subject lines are terrible and I would, personally, never open a mail with some of those subject titles.
I'm wondering if there were any testing results on the open rates based on these headlines / subject lines.
These subject lines are highly effective because MarketingProfs readers signed up to receive these newsletters from "Get To The Point!" and are aware that the content is useful for them. I agree these are engaging subject lines for this particular audience but not for general subject lines. The 7 rules are good, however, there is also a debate as to not repeating the company name in the subject line since the recipient should already be aware of whom you are and it can be considered wasted real estate.
In some countries, subject lines like these would be downright offensive, or even unintelligible.
I'm very disappointed in this article. The 7 tips haven't given us anything new. I would argue that tip 7 is a way to not only get your message deleted, but also blocked. I completely agree with what has already been said - the subject lines work for the audience of marketers that have opt'd in. If you are trying to make the point that those lines worked because you know your audience, you could have done that with 10 winning subject lines, not 100. It would have been helpful to see a list of action words that generate responses across industries.
Fascinating irony here. The subject line of the email that featured this article headline is VERY compelling - don't we all want a short cut to writing amazing subject lines?
But then this article didn't really deliver. The tips, although from respected folks in the email industry, are not highly actionable. Then, the list of subject lines is just from one particular organization, in the publishing business. With trained editors on staff. Huh. Not so helpful.
The headline/subject line promised me Subject Lines to steal. But I can't use any of these, I'm in a different business.
So it proves once again the only REAL rule about subject lines - they must be authentic and compelling in order to drive a response.
And there are no short cuts to that.
Nice try, Marketing Profs!
Some of these may be okay but some would get my spam and junk mail fast, and certainly would not be opened by me or the business executives I send to.
I especially can't believe in numbers 1,3,4,12,50,61,81,90,95,98,86. These seem way far out to go from a serious business to another serious business.
Agreed with all comments above. These subject lines would only be appropriate for marketers communicating with other marketers (and many of them are not even appropriate in that context). I could never use any of these subject lines in my B2B communications. This article is ridiculous.