How Compound caught its own daily email landing in Gmail Spam

How Compound caught its own daily email landing in Gmail Spam

Somebody who signs up for our daily email and never sees it has no way to tell us. So we send a copy to three of our own Gmail inboxes and read them ourselves. Two of the three had it in Spam.

Every sender check on those messages passed. SPF, DKIM and DMARC answer whether a message came from the address it claims, and nothing else. Our sending address was doing two jobs: it was where a reader's reply lands, and it was the from address on every daily send.

We split them. The daily email now goes out from a sending subdomain of its own, and the reply address stays on the main domain, which forwards, so a reader who hits reply reaches the same inbox as before.

<caption>Our daily email was landing in spam even though every sender check passed, so we now send it from its own address.</caption>

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