Matthew is a deliverability engineer at MailChimp. He manages our delivery team, visits anti-abuse vendors, and spends a lot of time thinking about Gmail.

A New MailChimp Record: 1.5 Billion Emails on Black Friday

Everyone knows that Black Friday and Cyber Monday are big days for sending email, but for our deliverability team, the planning starts much earlier in the year. Way back in July, we started provisioning 500 new IPs and 3 new routing servers to ensure we had the stability and delivery speed to make it through those days. …

Strategic Timing Tips for Resend Campaigns

We analyzed 1,300 campaigns and their corresponding resend campaigns to see if we could find what factors make resend campaigns successful. The first question I want to answer today is: How long should you wait to resend a campaign?

The Value of a Resend Campaign, By the Numbers

The phrase “one weird trick” usually sets off alarm bells, but what if I told you there was one weird trick that could increase your open rates by 8.7%? It’s true, and I have the data to prove it. All you have to do is resend your campaign to subscribers who didn’t open the first time.

Compliance Insights for MailChimp Pro

Like all the other departments at MailChimp, the primary goal of the Compliance team is to empower users. We’re always looking for ways to do this better, and working on MailChimp Pro, our brand new feature set for quickly growing businesses with lists of 50,000 or more, offered tons of opportunities. So while Pro was incubating, a few …

MailChimp Holiday Email Volume

This past December, MailChimp sent 14.1 billion emails. Whoa. That’s up 72% from December 2013. Our largest sending day of 2014 was Cyber Monday, when our users sent 741 million emails. Our top hour was 11am EST that same day, when they sent 50 million emails. Cyber Monday and Black Friday both experienced larger growth rates than the month …