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