Matthew

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.

How Gmail’s New Inbox Is Affecting Open Rates

I wanted to understand the impact of Gmail’s new tabbed inbox, so I dug deep into our database and pulled every delivery to Gmail for the past year and half. That amounts to 12.5 billion emails and more than 2 billion unique opens. It can be difficult to measure small changes in delivery because there …

Yahoo Is Recycling Email Addresses

UPDATE: 6/25/13 According to a recent statement by Yahoo, they’ll spend thirty days hard bouncing inbound traffic to any email address they plan to recycle on August 15th. That means you could see higher bounce rates on your list starting July 15th. Just so you know, many ISPs recycle dormant accounts into spam traps, and …

How Terra.es Closing Will Affect Your List

It appears Terra.es began closing accounts on a trial basis on April 16, and that all accounts will be closed by May 30. The move is final, but they’re giving customers a chance to migrate to Terra.com. Unfortunately, the change isn’t automatic. What does this mean for your list? You may have seen terra.es addresses …

How Member Ratings Work

If you ever tried to segment a list by engagement, you may have wondered about our member-activity rating. I’m talking about the little stars that look like restaurant reviews for your subscribers. I’m not sure how five-star restaurants get their rating, but I suspect it’s a little different than email. To come up with a …