Send Email Campaigns | MailChimp.com

Send Emails with Confidence

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Send Emails with Confidence

MailChimp is rated consistently at 97% or better inbox delivery by ReturnPath, an independent monitoring service. MailChimp receives feedback loops from all of the major ISPs, including Yahoo, and is a whitelisted sender where available. Unsubscribes and invalid email addresses are removed automatically.

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Email Authentication

Email Authentication Icon The largest corporations and financial institutions use authentication to prove their emails are not forgeries, so they don't get blocked by overly suspicious filters. We support DKIM, SenderID, SPF, and Domain Keys automatically and free in MailChimp. No server setup required. Learn More

Inbox Inspector

Inbox Inspector Icon Generate screenshots of your email in all of the major email clients and mobile devices, so you can make sure it looks perfect! Learn More

We’re Industry Members

We stay abreast of industry and technology standards by being active members in email and ISP organizations such as the ESPC (Email Sender and Provider Coalition), AOTA (Authentication and Online Trust Alliance), MAAWG (Messaging Anti-Abuse Working Group), and EEC (Email Experience Council).

Cloudmark and Barracuda Monitoring

Our abuse desk internally monitors our system with the same powerful filtering technology that major ISPs use to block spam.

Bounce Management

We don't just analyze your bouncebacks to clean your list. Our abuse monitoring system actively scans bounce logs for cryptic messages from spam filters and email servers to detect potential delivery issues.

Whitelists

Few ISPs employ whitelists these days because there are too many factors that determine a sender’s reputation. More and more are switching to feedback loops, which are more dynamic and can respond more quickly to reputation changes. In fact, being on a whitelist does not preclude a sender from being blocked, especially if their feedback loop complaints exceed the ISPs’ thresholds. Nevertheless, MailChimp is registered on the few remaining whitelists out there.

ISP Feedback Loops

We’re registered with all the major ISPs to receive alerts whenever your recipients report your campaigns as “junk” or “spam”. When that happens, we instantly unsubscribe those members from your list in order to keep you (and MailChimp) from being blocked in the future. We’re on feedback loops with AOL, Hotmail, Comcast, Yahoo, USA.net, Cox, Earthlink, and more.

IP Address Ranges

To protect our overall deliverability, MailChimp uses hundreds of IP addresses located in multiple data centers. These IPs are grouped into different reputation levels based on list member activity. Depending on which group of IPs email is sent from, inbox acceptance rates range from 96% to 99%. Learn More