
Email Fonts: What Actually Renders
Custom fonts in email work in about half of the clients your subscribers use. Here is how to use them so the other half still looks deliberate.
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Custom fonts in email work in about half of the clients your subscribers use. Here is how to use them so the other half still looks deliberate.

Buying a list fails for reasons that have nothing to do with ethics: the addresses are bad, the traps are deliberate, and the damage lands on your domain permanently.

Filters do not detect or penalise AI authorship. But there are three real, indirect ways AI writing damages deliverability, and all three are avoidable.

Gym email has one job: stop people cancelling. Attendance data predicts churn weeks in advance, and almost no gym uses it.

Every rate metric in email improves when you email fewer people. Revenue per subscriber is the one number that does not, which makes it the only honest scoreboard.

Send frequency is the decision that determines your unsubscribe rate, your complaint rate and eventually your inbox placement. Most people set it by accident.

Everyone at your company sends email all day. The signature is the only marketing channel with a hundred percent open rate, and most companies waste it on a logo.

Under GDPR and CASL the burden of proving consent is on you. Here is exactly what to store, and the field everyone forgets until a regulator asks.

Clustering a list is a real statistical problem and models are good at it. The catch is that a cluster is not a segment until you can say what it means.
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