Writing outreach became free, so everyone sends more of it — and the infrastructure that receives it changed the rules while nobody was reading. One 5-minute drill a day on the parts that actually decide whether you get a reply, with the rule that stops a model inventing facts about real people.
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The Threshold
Roughly three complaints in every thousand messages. Volume outreach crosses it easily, and once your domain reputation goes, the quality of your writing becomes irrelevant.
Source: Google email sender guidelines, requirements in force since 1 February 2024.
The Real Target
0.30% is the point at which classification degrades. 0.10% is the ceiling Google recommends, because staying low is what makes you resilient to the occasional spike. Most senders aim at the cliff edge.
Source: Google email sender guidelines.
The Bulk Line
Above that you need SPF, DKIM and DMARC with alignment, plus one-click unsubscribe and a visible unsubscribe link. Most outbound teams cross this line without anyone checking whether they met the conditions.
Source: Google email sender guidelines.
No course platform. No 6-hour videos. A daily drill you run in any AI assistant — built around real prospects and real numbers, and around the rule that a model never invents a detail about a person.
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30-Day AI Challenge · Lead Generation & Sales Edition
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