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Cold Email Weekly.

Long-form writing on deliverability, infrastructure, and agency operations. One post a week. No fluff.

Monitoring May 21, 2026 8 min read

Why your cold email keeps going to spam: the leading indicators you're ignoring

Cold-email senders find out their domains are dead two weeks after they died. Here are the leading indicators that surface decay before deliverability collapses, and how to monitor them.

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