Mobile has already reshaped how email gets read and acted on. In 2024, 41% of email recipients check their inbox on smartphones at least once a day, and 51% of global email opens happen in mobile apps. Meanwhile, deliverability and security pressures keep rising, with 1.3 billion phishing emails blocked in 2023, so the real question is what happens to your message once it leaves the desktop and reaches a pocket.
Key Takeaways
- 41% of email recipients worldwide check email on smartphones at least once a day (share of respondents checking email daily on smartphone).
- 46% of email users open emails on their phones even when the email was originally received on a desktop or laptop (share of users opening on mobile).
- Apple Mail accounts for about 10% to 15% of total email opens in the US (opens share by provider/client).
- Email marketing typically costs 10% of the cost of traditional marketing channels for comparable outcomes (relative cost ratio).
- Under GDPR, penalties can be up to €20 million or 4% of global annual turnover for certain violations (maximum penalty amount/percentage).
- $1.89 returns for every $1 spent is a widely cited benchmark for email marketing ROI based on industry data from 2023/2024.
- The global email marketing market is forecast to reach $15.7 billion by 2028 (market forecast).
- Deliverability improvements can reduce marketing waste by 10% to 30% through fewer bounces and higher inbox placement (savings range tied to deliverability).
- Average email conversion rates are typically 0.5% to 3% depending on industry and list quality (conversion-rate range).
- Spam complaints averaging 0.1% or higher are generally considered a deliverability risk by many ESPs (threshold statistic).
- Google’s Gmail and Yahoo Mail support for ARC and MTA standards continued to reduce authentication failures, contributing to lower phishing success rates (trend tied to standards).
- Mobile-first indexing means Google predominantly uses the mobile version of content for indexing and ranking, affecting mobile email landing pages (mobile-first indexing behavior).
- In 2024, 52% of US smartphone owners use their phone for online shopping at least monthly (share relevant to mobile email commerce).
- In 2023, Microsoft reported that 1.5% of email was quarantined by Defender for Office 365 (malware/phishing/impersonation protections).
- 1.3 billion phishing emails were reported as blocked worldwide by major email security providers during 2023 calendar year (as reported in annual security summaries).
Mobile email dominates opens, with deliverability and phishing protection driving major ROI and reduced marketing waste.
Related reading
01 · Category
User Adoption6 stats
01
41% of email recipients worldwide check email on smartphones at least once a day (share of respondents checking email daily on smartphone).[1]
02
46% of email users open emails on their phones even when the email was originally received on a desktop or laptop (share of users opening on mobile).[2]
03
Apple Mail accounts for about 10% to 15% of total email opens in the US (opens share by provider/client).[3]
04
In 2024, 84% of consumers in the US use email (share of US adults using email).[4]
05
51% of global email traffic is opened in mobile apps (not mobile web) according to Litmus’ 2024 Email Client Market Share data.[3]
06
31% of email users report that they read emails primarily on mobile devices (self-reported preference across surveyed consumers).[5]
Interpretation
User Adoption Interpretation
For the User Adoption angle, the data shows mobile is no longer optional because 41% of recipients check email on smartphones at least once a day and 51% of email traffic is opened in mobile apps, with even 46% of users opening emails on their phones regardless of whether they arrived on desktop or laptop.
02 · Category
Cost Analysis3 stats
01
Email marketing typically costs 10% of the cost of traditional marketing channels for comparable outcomes (relative cost ratio).[6]
02
Under GDPR, penalties can be up to €20 million or 4% of global annual turnover for certain violations (maximum penalty amount/percentage).[7]
03
$1.89 returns for every $1 spent is a widely cited benchmark for email marketing ROI based on industry data from 2023/2024.[3]
Interpretation
Cost Analysis Interpretation
From a cost analysis perspective, email marketing’s relative cost is about 10% of traditional channels for similar outcomes and it delivers roughly $1.89 in returns for every $1 spent, making it a notably efficient option even while GDPR risk caps penalties at €20 million or 4% of global turnover.
03 · Category
Market Size1 stats
01
The global email marketing market is forecast to reach $15.7 billion by 2028 (market forecast).[8]
Interpretation
Market Size Interpretation
The market size for mobile email is expected to keep expanding, with the global email marketing market forecast to reach $15.7 billion by 2028.
More related reading
04 · Category
Performance Metrics9 stats
01
Deliverability improvements can reduce marketing waste by 10% to 30% through fewer bounces and higher inbox placement (savings range tied to deliverability).[9]
02
Average email conversion rates are typically 0.5% to 3% depending on industry and list quality (conversion-rate range).[10]
03
Spam complaints averaging 0.1% or higher are generally considered a deliverability risk by many ESPs (threshold statistic).[11]
04
In 2023, 1.2% of email traffic was blocked by major spam defenses (email block rate).[12]
05
2023 data breach initial access was phishing at 22% globally across surveyed organizations (share of breaches starting with phishing).[13]
06
In the Verizon 2024 DBIR, 43% of breaches involved credential theft, often via email-based techniques (share involving credential theft).[13]
07
4.6% of email recipients clicked a link in an email in 2024, with mobile devices contributing to click-through behavior.[14]
08
0.6% average bounce rate is a common benchmark reported for permission-based email lists in 2024 studies.[15]
09
Mobile click-through rates are typically 1.6x higher on smartphones than on desktops in retail and ecommerce email campaigns (device mix reported in benchmarks).[16]
Interpretation
Performance Metrics Interpretation
For Performance Metrics, improving deliverability by cutting bounces and boosting inbox placement can reduce marketing waste by 10% to 30%, while mobile engagement remains strong with click through rates typically 1.6 times higher on smartphones than desktops.
05 · Category
Industry Trends8 stats
01
Google’s Gmail and Yahoo Mail support for ARC and MTA standards continued to reduce authentication failures, contributing to lower phishing success rates (trend tied to standards).[17]
02
Mobile-first indexing means Google predominantly uses the mobile version of content for indexing and ranking, affecting mobile email landing pages (mobile-first indexing behavior).[18]
03
In 2024, 52% of US smartphone owners use their phone for online shopping at least monthly (share relevant to mobile email commerce).[4]
04
2FA adoption reduced account takeover rates by 50% in industry analyses (account takeover reduction with 2FA).[19]
05
The number of DMARC policy records observed globally exceeded 10 million by 2024 (DMARC record count).[20]
06
74% of marketers use triggered automation in email marketing in 2024 (automation adoption share).[21]
07
41% of marketers say deliverability is a major challenge (share reporting deliverability challenge).[22]
08
33% of email users say they would unsubscribe from promotional emails that don’t display well on their phone.[22]
Interpretation
Industry Trends Interpretation
Industry Trends are pointing to a mobile-first reality in which 33% of email users say they would unsubscribe from promotional messages that do not display well on their phones, making deliverability and rendering increasingly decisive for email marketing success.
06 · Category
Security & Risk2 stats
01
In 2023, Microsoft reported that 1.5% of email was quarantined by Defender for Office 365 (malware/phishing/impersonation protections).[23]
02
1.3 billion phishing emails were reported as blocked worldwide by major email security providers during 2023 calendar year (as reported in annual security summaries).[24]
Interpretation
Security & Risk Interpretation
In 2023, Microsoft quarantined 1.5% of email under Defender for Office 365 while major security providers blocked 1.3 billion phishing emails worldwide, highlighting how persistent phishing threats are driving high-impact Security and Risk controls.
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Henrik Dahl. (2026, February 13). Mobile Email Statistics. Gitnux. https://gitnux.org/mobile-email-statistics
MLA
Henrik Dahl. "Mobile Email Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/mobile-email-statistics.
Chicago
Henrik Dahl. 2026. "Mobile Email Statistics." Gitnux. https://gitnux.org/mobile-email-statistics.
Sources & references
24 sources cited across this report
pewinternet.org
invespcro.com
litmus.com
pewresearch.org
gartner.com
wordstream.com
eur-lex.europa.eu
marketsandmarkets.com
sendgrid.com
omnisend.com
sparkpost.com
cloudflare.com
verizon.com
mailchimp.com
sendinblue.com
campaignmonitor.com
security.googleblog.com
developers.google.com
pages.nist.gov
dmarc.org
salesforce.com
hubspot.com
microsoft.com
checkpoint.com