40+ Email Marketing Statistics [2025]

Did you know that email marketing delivers an astonishing $42 return for every $1 spent? 

Despite overflowing inboxes, it remains the most profitable digital marketing channel in 2025. So, why not make it work for you?

In this article, we’ll dive into essential email marketing statistics for 2025 to help you create campaigns that stand out and deliver results. From open rates to click-through benchmarks, we’ve got the data you need to maximize your ROI.

Key takeaways

• Over 361 billion emails are sent daily, projected to hit 408 billion by 2027. Gmail dominates with 1.8 billion of the 4.48 billion global users.
• Email marketing delivers up to $42 for every $1 spent, outperforming social media by a wide margin.
• 88% of people check their emails daily, but 69% unsubscribe if they feel overwhelmed.
• 61% read emails on their phones, and 70% delete poorly formatted emails in under three seconds.
• Tailored emails generate six times more engagement and sales than generic ones.
• Nearly 97% of users receive spam, and frequent or suspicious emails risk being flagged.
• Email drives 66% of consumer purchases and is the top priority for 59% of B2B marketers.

Email usage statistics

The number of emails sent daily grows steadily, having exceeded 361 billion in 2024 and projected to reach over 376 billion in 2025—a 4% annual increase. By 2027, this figure is expected to surpass 408 billion emails per day, equating to approximately 90 emails per user daily.

More than half the world relies on email every day. By 2024, there were 4.48 billion email users globally, with each person managing an average of 1.75 accounts. Gmail leads the pack as the most popular provider, with 1.8 billion users connecting through its platform.

Email ROI statistics

Email marketing is one of the most profitable strategies out there. It delivers a return of $36 to $42 for every $1 spent—an ROI of up to 4200%. While social media also ranks high, email remains the most cost-effective option, with no production costs. That’s why 14% of marketers say it’s the best channel for driving results.

Email engagement statistics

For most people, email is a part of daily life:

• 88% of users check their inbox multiple times a day, while only 3.5% don’t check daily.
• When opening emails, 42% of users look at the sender’s name first, making it a key factor in building trust.
• However, 69% of consumers unsubscribe when they feel overwhelmed by email frequency.

The takeaway? Consistency and sender trust are essential, but overloading your audience can quickly backfire.

Mobile email statistics

Most people check their emails on the go, with 61% using a mobile device as their main way to stay updated. 

In fact, 81% of users prefer reading emails on their phones, while 21% choose tablets for a bigger screen.

But here’s the catch: if an email isn’t mobile-friendly, 70% of users will delete it in less than three seconds. 

Email subject line statistics

Your subject line can make or break your email. Nearly 47% of users decide to open an email based on the subject line alone, while 69% will mark it as spam if it feels off.

The key? Keep it short and clear. Subject lines with 21 to 25 words get just a 9% open rate, meaning less is more. 

Want to grab attention? Emails with emojis in the subject line see a 56% higher open rate.

Personalized email marketing statistics

72% of users are more likely to open an email if its subject line is personalised.

Homegoods retailer Williams-Sonoma reported that personalised email marketing resulted in a 10 times increase in responses from personalised email offerings, which were based on the customers’ shopping history.

Email Frequency and Timing Statistics

For B2B marketing, it is best to send emails during work hours (mainly mid-morning). However, for B2C email-marketing it is profitable to send emails during weekends or evening hours, as individuals are then at home and can check their inbox with focus.

Email Marketing Automation and Efficiency Statistics

Email is the most frequently automated marketing channel. 55% of marketers use automation for email marketing, and automated emails produce 320% more revenue than non-automated emails. 

Email marketing can be up to 40 times more effective than social media, if done correctly.

B2B Email Marketing Statistics

59% of B2B marketers say email is their primary revenue channel.

It’s no surprise that 81% rely on email newsletters to share valuable content and keep their audience engaged.

While B2B emails tend to have a lower open rate (15.14%) compared to B2C emails (19.7%), they make up for it with a higher click rate (3.18% vs. 2.09%). That means when B2B emails do get opened, they drive more action and engagement.

B2C Email Marketing Statistics

The average open rate for B2C emails is 20.94%. 59% of consumers state that email marketing affects their buying choices, with 50% of them making purchases from marketing emails at least once per month. 

87% of B2C marketers use automation as an integral part of their email marketing strategy.

Welcome emails perform particularly well in the B2C industry, as they have an inbox placement rate of 84% and a read rate of 23%, making them effective in engaging new subscribers.

The real game-changer? Personalization within emails results in 6x higher transaction rates.

Email Spam Statistics

Spam is everywhere. A staggering 96.8% of people have received spam messages in some form, and 78% of recipients mark an email as spam if it appears suspicious.

In 2023, 65% of email marketing professionals reported facing greater challenges in achieving successful email deliverability. Additionally, 7% of emails ended up in spam folders, while another 7% failed to reach recipients entirely.

Sending too many emails can result in them being flagged as spam, with each email provider having their own limit. For free accounts, Gmail allows up to 500 emails per day, while paid accounts have higher limits, permitting up to 2000 emails per day.

FAQ

How effective is email marketing?

Email marketing is highly effective as it remains one of the most powerful channels for engaging consumers and driving sales, outperforming social media by up to 40%. While some see email as outdated, 66% of online purchases stem from email campaigns, compared to 20% from social media.

How many emails does Bill Gates get per day?

Microsoft's cofounder told “Today” in an interview that he only receives 40-50 emails per day.

How many emails does a CEO get a day?

The average CEO gets 121 emails per day. However, Apple’s CEO, Tim Cook reportedly receives between 700 and 800 emails daily, reading the majority of them. It all depends on the industry, company size and management strategies.

What is the 80/20 rule in email marketing?

The 80/20 rule, or Pareto Principle, suggests that 80% of your email marketing results stem from 20% of your efforts. In practice, this means that a small portion of your emails—such as your most engaging content or a very highly responsive part of your audience—drives the majority of your outcomes. 

Recognizing this can help you prioritize optimizing these high-impact areas to enhance your overall email marketing effectiveness. 

How many marketing emails is too many?

The ideal number of marketing emails depends on your audience and industry, but a common benchmark is 1-2 emails per week. Sending more can overwhelm or annoy subscribers. Signs you're sending too many emails include increased unsubscribe rates, declining open and click-through rates, or complaints about spam. To find the right balance, monitor engagement metrics and consider asking your subscribers how often they want to hear from you. Quality and relevance matter more than quantity.

Wrapping up

And that’s a wrap! Email marketing proves it’s still the champion of engagement and ROI when done right—personalized, optimized, and straight to the inbox!

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