64+ Best Re-Engagement Email Subject Lines [2021]

64+ Best Re-Engagement Email Subject Lines [2021]

If you're looking to boost your email open rates and increase sales, your email subject line is the first (and most important) step in achieving those goals.

Did you know that 33% of email recipients open emails because of an engaging subject line?

That's why it's critical to craft a catchy email subject line that will get you the traffic and conversions you deserve.

We've put together a list of 64+ best re-engagement email subject lines [2021].

Some are proven examples from other successful campaigns, and some are creative ideas to inspire you.

Creative Email Subject Line Ideas

  • Long time no see, <Name>
  • Glad to have you back, <User Name> !
  • Welcome Back, <User Name> ! Check Out What’s New…
  • Surprise — A Profitable Unicorn
  • Just Remember… We Just Love Treating You: Get 20% Off Everything!
  • Last call: 3-year plan for you only
  • We’ve Missed You! Here’s 15% OFF EVERYTHING
  • Don’t let someone else snatch up your items!
  • You haven’t read our recent messages. Should we stop emailing you?
  • Is this goodbye?
  • Thanks for being our customer
  • Unlimited (products) are just a few steps away
  • WE MISS YOU! Don’t Pass up This Unique Code Inside + Complimentary Shipping
  • Keep ‘em coming
  • Are we on the same page?
  • You’ll hate to miss this one
  • Don’t forget about us…
  • Do you find our updates/suggestions/info valuable?
  • We hate to see you go
  • Happy first anniversary to us
  • Long time no see, {{firstname}}
  • A unique coupon to welcome you back!
  • Do you still want updates from us
  • Are you sure you want to leave this behind?
  • $15 to get over the hump 🐪
  • We miss you, <Name>
  • We want to help meet your goals. Let’s reconnect.
  • Welcome back to XYZ
  • Don’t leave a good thing behind
  • Is XYZ Company still welcome in your inbox?
  • We’ve Missed You — NEW Special Offer Inside
  • There’s Still Time! Extra 20% Off
  • Welcome Back, {{firstname}}!
  • Here’s what you’ve missed, <Name>
  • Thank you for choosing us
  • {{firstname}}, it’s been a while…
  • Your relationship with XYZ Company is important to us
  • Busy bee? Let us help.
  • <Name> , what’s next?
  • Just for you
  • We’d hate to miss your birthday 🎂
  • We’ve missed you! Here’s 15% OFF EVERYTHING — even furniture!
  • A message to {{firstname}}
  • Welcome Back to XYZ! Check Out What’s New…
  • You’ve been selected to receive $50 of free XLM
  • Checking in with you, <Name>
  • Are we breaking up?
  • We haven’t seen you in a while 😢
  • We Want You Back!
  • Glad to have you back {{firstname}}
  • {{firstname}}, we miss you!
  • Want the (product/pass) for free?
  • We miss you! We’re singling you out for this: 20% OFF expires TONIGHT
  • It’s Been a While! We’ve missed You!
  • Do you still want to hear from us?
  • A good deal is always good news (in your inbox)
  • 20% Off. Because We Miss You ❤
  • We’re wondering…
  • Let’s Catch Up….
  • We noticed you’ve been a little distant lately 6
  • 20% off. Because we miss you
  • Have you seen this weird picture?
  • We Still Miss You. (And You Still Have 20% OFF!)
  • We need to have THE TALK

GUIDE: How To Write A Great Subject Line

As we mentioned above, crafting a catchy subject line is critical to the performance of your email campaign.

While just a few words may seem like a small piece of your overall message, this is the first impression your audience will have before they decide whether to open your email.

If your subject line isn't engaging or appealing enough, there's a chance it could get buried in your reader's inbox.

Let's go over the proven tips on how to craft a subject line that boosts engagement:

What makes a great subject line?

First, let's discuss the fundamentals of creating a great subject line:

  • Spark interest and curiosity
  • A clear and urgent call to action
  • An offer/intriguing discount
  • Personalization (this can be done by sending out different versions of emails to subscribers based on their preferences)
  • Relevance - make sure your subject line covers the current trends and topics within your industry

5 Tips To Crafting a Great Subject Line

Now, let's dive into the specifics of how to create a great subject line for your next campaign:

1. Use a familiar sender name

Although this may seem obvious, it's a piece many marketers miss the ball on.

Your readers want to feel like your email is coming from a human and not a corporation or automated system.

One of the easiest and most effective ways to do this is by changing the sender's name to YOUR name or someone in the company that is well known.

Here's a great example of this from Marketing Examples


Pro Tip

Avoid the "no-reply" sender name at all costs. This makes your email feel unfamiliar, unapproachable, and less personable.

2. Keep your subject short and to the point

If your subject line is too long, it will get cut off, which could impact your reader's chances of opening your email.

The rule of thumb (for both mobile and desktop) is to keep your subject line under 50 characters.

3. Add personal touches to your subject line

If you have access to information about your subscriber (ie. name, location, etc), you can use this to benefit your subject line and catch your readers attention.

It's important not to go overboard here, but adding even the simplest touch such as their name can build trust and rapport.

Here's a great example of a personalized email + offer I received from BarkBox with my dog's name in the subject line:


4. Avoid making any false promises

Your subject line makes a commitment to your reader, so it's important you don't stretch the truth just to simply get more opens and clicks.

In the grand scheme of things, making false promises will end up hurting your open rate as your readers will lose trust in you.

5. Give them a sneak peek of what's inside

Telling your subscriber what is inside helps with open and clicks.

For example, if you're providing your reader with a free guide or e-book, consider making your subject line something along the lines of:

"Your FREE marketing e-book awaits!"


If you want your email campaign to perform well, it all starts with your subject line.

Think about the emails you receive in your inbox and what makes you click vs what gets buried - odds are, the same habits go for your customer.

We hope you enjoyed our guide + list of 64+ best re-engagement email subject lines [2021].

Pat Walls,  Founder of Starter Story

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