20 Statistics About Sales Email Subject Lines You Need to Know for 2023

Doug Bonderud
Doug Bonderud


Sales emails are a great way to capture customer attention and drive revenue. Of course, this comes with a caveat, since recipients have to actually open these emails for campaigns to work. Here, the old adage holds true — you only get one chance to make a first impression.


And the first thing prospective customers see? Your subject line. To help you create attention-grabbing subject lines that boost open rates and get potential purchasers interested, we’ve collected 20 statistics you need to know.

Ready to go from email trash bins to open sesame? Let’s get started.


Sales Email Open Statistics

  • There are over 4 billion email users worldwide, and this number is predicted to reach 4.5 billion by 2025. (Statista, 2023)
  • More than 300 billion emails are sent and received each day across the globe. (Statista, 2023)
  • The average open rate of emails across all industries is 22.61%. (Mailchimp, 2022)
  • When it comes to welcome emails, meanwhile, open rates are 68.6%. (GetResponse, 2022)
  • The average click-through rate of all emails is just 2.91%. (Mailchimp, 2022)
  • 64% of recipients decide to open or delete emails based on subject lines. (Finances Online, 2023)
  • 33% of users choose to open emails because of catchy subject lines. (Finances Online, 2023)


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  • 71% of B2C sales professionals say that establishing rapport during the sales process is the most effective strategy for selling to new customers — and it all starts with email subject lines. (HubSpot’s 2023 Sales Trends Report)

Now that you understand the importance of your subject lines, it’s time to build out the body of your email and turn initial customer interest into curiosity and conversion. Start with some of our most effective sales prospecting email templates to boost open rates.



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