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Number of e-mails per day worldwide 2017-2025

With the internet becoming increasingly accessible, the number of e-mails sent and received globally has increased each year since 2017. While roughly 306.4 billion e-mails were estimated to have been sent and received each day in 2020, this figure is expected to increase to over 376.4 billion daily mails by 2025.

E-Mail marketing

Despite the increasing popularity of messengers, chat apps and social media, e-mail has managed to remain central to digital communication and continues to grow in uptake. By 2025, the number of global e-mail users is expected to reach a total of 4.6 billion - an approximate six hundred thousand increase in users, up from 4 billion in 2020. Not only that, when it comes to online advertising e-mail has seen higher click-through-rates than on social media. In Belgium and Germany, these were 5.5 and 4.3 percent respectively - compared to the 1.3 percent global average CTR for social media during the same time period.


Launched in April 2004, Google’s Gmail has earned its spot as one of the most popular freemail services in the world. According to a 2019 survey, its popularity worldwide was trumped only by Apple’s native iPhone Mail app with 26 percent of all e-mail opens worldwide taking place on the platform. Millenials surveyed in the United Kingdom listed Gmail among their top 5 most important mobile apps, while a similar survey carried out in Sweden saw Gmail tie with WhatsApp for a spot among the top mobile apps nationwide.

Number of sent and received e-mails per day worldwide from 2017 to 2025

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Release date

February 2021



Survey time period

2017 to 2020

Special properties

for both business and private purposes

Supplementary notes

* Forecast.
2017 to 2019 data from previous publication.

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Statistics on "E-mail usage in the United States"

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