What is graymail?

Graymail is email you technically consented to receive but no longer want. It's not spam (you did sign up), but it's not welcome either. Think: daily deal newsletters you haven't opened in six months, brand updates from a store you bought from once, weekly digests you scroll past without clicking.

Graymail matters because mailbox providers like Gmail and Outlook track engagement. If your emails consistently get ignored, your sender reputation drops. That affects where future emails land. Not just the graymail itself, but ALL your emails to that domain. Your open rates fall, your clicks fall, and eventually your messages start landing in the Promotions tab, or worse, spam.

But The tricky part is that graymail looks legitimate to spam filters (you have permission, authentication passes, content isn't spammy), but the engagement signals tell a different story. Providers watch how many people open your emails, how many click links, how many mark you as spam, and how many just ignore you completely. Graymail generates that last signal in volume.

Common causes: sending too frequently without matching interest (daily emails to someone who only buys once a year), not segmenting by behavior (sending product launches to people who only read how-to content), keeping inactive subscribers on your list forever, or sending the same content to everyone regardless of what they actually clicked in the past.

How to fix it: segment by engagement, send less often to people who rarely open, sunset inactive subscribers after 6-12 months of zero engagement, and make it easy to adjust frequency or unsubscribe. The goal isn't to trap people on your list. The goal is to keep a list of people who actually want to hear from you. And if you're not sure how much of your list has turned into graymail, check your engagement rates by cohort. How many people who joined 12+ months ago still open your emails? If that number is under 20%, you've got a graymail problem. (And yes, we help with that.)