Writing engaging subject lines for thank you emails is one more way of showing appreciation to your subscribers. 

Thank you emails go a long way in building up your brand’s authority and credibility. Think about it. Have you ever made a purchase online and received a thank you email? How did it make you feel?

Probably very appreciated. 

That’s the same kind of feeling you should aim to invoke in your subscribers after they complete some desired action. This could include:

  • Making a purchase
  • Submitting Feedback or Reviews
  • Signing up for your Memberships
  • Joining Your Mailing Lists

All of these actions warrant some form of appreciation. And in email marketing, this appreciation comes in the form of a thank-you email. 

But, what’s the first thing your subscribers see once your email arrives in their inboxes? The email subject line right?

We already know how important it is to craft engaging email subject lines for sales emails. Well, the subject line is just as important for thank you emails. 

Over 33% of people will decide to open your email based on your subject line alone. So let’s look at 8 effective ways to craft effective email subject lines for thank you emails.

Before we get started, let’s take a moment to address some crucial points about the Thank You Email.

Why are Thank You Emails Important? 

You are not entitled to your customer’s loyalty. This is something you have to earn. Regardless of what service or product you offer, there are tons of competitors offering something similar. 

Your subscribers really do not have to invest their time with your brand. One of the easiest ways to get people to stick with you is to show how valued they are. You can do this by showing genuine appreciation with thank you emails. 

These emails provide additional and vital information to subscribers.

Here are a few instances when thank you emails can play an important role:

Asking Customers For Feedback

Customer feedback will help you understand what you are doing right and what needs improving.

Requesting such feedback in a thank you email is both effective and natural. Companies commonly do this with the use of online surveys or questionnaires. 

It’s especially effective to gather feedback after offering customer service to a client. 

To Thank Customers For Completing A Purchase

Thank-you emails like this help thank customers and promote loyalty.

An automated thank you email after someone has purchased a product can be another thank you strategy if done correctly.

Here’s one automated message for a recent purchase made to Canva:

canva thank you email

for example, with the following message: “I’m so glad we were able to provide what was needed at an affordable price!”

To Thank People For Time Invested With Your Company

It’s always a good idea to thank people for any time and effort invested in your business. Remember, people have a lot of options to choose from. Making the extra effort to show appreciation will differentiate your brand. 

Tony Robbins does this very well:

tony robbins thank you email

Let people know you appreciate them checking out your offers, website, landing pages, etc. 

To Thank People For Joining Your Mailing Lists

And of course, once someone signs up for your email list you should definitely send them some thanks. Use this opportunity to set the tone of what to expect in your upcoming emails and request important actions. 

For example, you can ask subscribers to whitelist your sender’s address so that your emails end up in their inboxes.  

This also gives your subscribers another opportunity to decide if they actually want to be on your list. In the long term, this will only lead to a more responsive email list. 

Here is a superb example from Dell sent to me recently:

dell thank you email

Now, as said before, most people won’t even bother reading your emails if our subject lines aren’t good. So let’s spend some time looking at that now. 

What Makes A Good Email Subject Line?

Thank you emails are simple to produce and send. But many people avoid doing so because they don’t want to take the time to develop compelling subject lines.

Thank you email is likely among the many that someone will receive in a day. So if it doesn’t stand out from the crowd, it may not be read at all.

Good email subject lines allow you to improve inbox deliverability rates. It can impact your e-commerce revenue generation and possibilities via online transactions. Having a well-written subject line is vital.

It’s not just about Thank You emails, either. Ensure that all your emails include appropriate subject headings. Again, it can help to enhance the effectiveness of written word communication.

If you can type up good email subject lines your open rates will skyrocket. Higher open rates will open the doors to better engagement and conversions. The bottom line is, the more people open your emails the better your results will be. 

So here are 7 pointers to help you craft not just good but great subject lines for thank you emails.

7 Powerful Tips For Writing Subject Lines For Thank You Emails

Tips For Writing Subject Lines For Thank You Emails

1. Personalized Subject Lines

Make your subject lines for thank you emails personally by using the person’s name. It brings a sense of familiarity to the email and tells that it is meant for them, personally.

Your email subject line should be personalized and reflect your business.

Make sure that it’s concise, specific to your audience, and clear about the content of the email.

One last thing, make sure your email subject line is personalized to every person who opened it.

make sure your email subject line is personalized to every person who opened it.

Emails that include personalized subject lines will always perform better than those without them. It creates a sense of familiarity with the reader, leading to an emotional response. 

2. Short and Sweet Subject Lines

Short subject lines are direct and effective. They get to the point right away and readers will be able to grasp the purpose of your content immediately. 

Short subject lines are direct and effective

3. Use Emojis In The Subject Line

Using emojis in email subject lines is a great way to make your emails stand out in the inbox. Emojis add visual impact that captivates and draws your subscribers’ attention. Which means can help you get more open rates for your campaigns.

Emojis also make it more enjoyable when reading an email from a brand or company. It can also help with emojis that are relevant to your campaign or the subject matter.

Emojis in email campaigns have been found to increase user engagement and click-through rates. 

Especially in B2C or Business Customers industries like social media platforms. Due to their current popularity on sites such as Instagram, Facebook, and Twitter.

It will also assist you in grabbing your users’ attention the moment they see emojis.

Use Emojis In The Subject Line

Although the thank you email is an exception. The rule is to use only one emoji in your email subject lines.

4. Mention A Sale Or Special Offer 

It is a good idea to mention a sale or special offer in your emails to spark curiosity in people.

You can make a sale or special offer seem more appealing by placing it in your subject line. It is especially true if you’re sending them news about fantastic deals and discounts.

Though it may seem as though we’re trying too hard, placing these promotions in subject lines makes them feel good about opening your emails.

People will want what is being offered even more when they see that this offer is specifically targeted to them. 

Mention A Sale Or Special Offer

5. Include Powerful or Emotional Words

One way to get people’s attention in your email subject line is by using powerful, emotional words.

The readers will be intrigued and interested because of the emotional tone that your subject line entails. 

It can cause them to think or feel emotional towards your content.

When we read subject lines like this, we often wonder what the letter has to do with our product or service. As a result, you’ll have more subject lines that pique your readers’ interest.

If you’re using power words in subject lines, it’s a good idea to display a call-to-action (CTA) at the end of the message.

It will catch readers’ attention because they’ll interpret it as something that makes them feel good or happy. People can connect with what you’re saying through subject lines like this if

Examples of power words are:

Include Powerful or Emotional Words

examples of emotional words are:

examples of emotional words

Using powerful or emotional words like this can make the subject line more captivating and engaging for your audience to read.

It triggers readers’ curiosity and builds trust between them and your brand.

using trigger words in email subject lines

6. Split Test Subject Lines

Of course, not all of your campaigns will be a success. And sometimes all you have to do to get better results is tweak one little thing. That one little thing may just be your email subject line. 

mailvio split testing

When just starting out, split-test different email subject lines to see what’s working. Over time you will better understand the language of your subscribers and know exactly what they’ll respond to. 

This will lead to higher open rates and overall campaign success. In the end, more of your audience will receive your thank you emails and read them. Leading to them feeling more appreciated and more trust in your brand. 

7. Include Specific Details

Providing customers with important details about a purchase and other activities shows just how committed you are to building customer relationships.

You also make it easier for them to discover what comes next after their purchase, whether it’s from your side or theirs.

It is a fantastic way to check up on them and see any queries regarding their purchase. 

New information builds trust between your brand and the customer. It will make them more likely to interact with future emails.


Thank you emails are a great way to show appreciation to your subscribers for engaging with your business. They help to build customer loyalty and brand relationships and also distinguish you from the crowd.

Choosing the right subject lines for thank you emails will ensure that more of your readers receive your message of thanks. Since over 33% of people decide if they should open an email or not based on the subject line alone…

It is essential that you put some thought into crafting effective subject lines for your thank-you emails. Otherwise, your readers may never open your emails and might end up feeling unappreciated.

The tips shared in this article will definitely help you get more out of your thank-you emails. But remember, nothing is set in stone so think outside of the box and try different subject lines by split testing. 

Most popular email autoresponders such as Mailvio make it extremely easy to split test subject lines.

And in closing, I want to say a big thank you for reading this entire article. You are very much appreciated. 


Steven is the co-founder of Mailvio and oversees the operations and technical strategy and implementations. Steven has been an online entrepreneur since he was 14 years old and has been running SaaS companies for the last 10 years.


  1. […] your customers’ previous actions to personalize the experience, like when writing thank-you email subject lines after the customer completes an action. Make your emails more relevant and personalized by […]

  2. […] sure the subject line for your thank you emails is clear and catchy, […]

  3. Thanks for sharing these insights! I can’t wait to put them into practice and see how they improve engagement with my subscribers.

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