23.7 Billion

Emails sent last month


Average Sender Score*

Deliverability isn't just a score. After all, sending billions of emails gets complicated, which is why we have an advanced delivery infrastructure and in-house abuse-detection technology. We use hundreds of IP addresses located on multiple data centers, and we stay current on industry and technology standards. MailChimp's delivery team manages our complex infrastructure, visits anti-abuse vendors, and monitors IP reputation 24/7. We're also constantly examining trends, conducting research studies, and learning from data in order to further empower our 12 million users.

MailChimp

98

ESP A

94

ESP B

95

ESP C

94

Return Path's Sender Score is aggregated from 60 million mailboxes at a variety of ISPs, spam filtering, and security companies.


Weekly Delivery Rates

Every ISP has different rules, spam filters, and network hiccups. Below are the five most popular that MailChimp sends to, including email volume, send time per campaign, and average bounce rate.

Emails sent

2.24 Billion

Average send time

20 sec

Bounce rate

0.29 %

Emails sent

1.23 Billion

Average send time

92 sec

Bounce rate

0.47 %

Emails sent

196 Million

Average send time

34 sec

Bounce rate

0.34 %

Emails sent

1.02 Billion

Average send time

161 sec

Bounce rate

0.27 %

Emails sent

67.5 Million

Average send time

24 sec

Bounce rate

0.22 %

Weekly Global Send Volumes

MailChimp customers send newsletters all over the globe. Mouse over the territories on the map to find out how much volume is sent to each.