9 word email rule - SERP Analysis

https://medium.com/grow-yourself-grow-your-business/the-simple-powerful-nine-word-email-that-converts-leads-to-customers-72bb6a0b4a60

https://www.benchmarkone.com/blog/implement-9-word-email-marketing/

https://www.technologymarketingtoolkit.com/blog/the-power-of-the-nine-word-email-a-simple-strategy-to-resuscitate-dead-leads/

https://www.kimkiel.com/podcast-1/9-word-email

https://www.youtube.com/watch%3Fv%3D4j-lEqDWoao

https://member.archmarketing.org/courses/rapid-results/lessons/the-magic-9-word-email/

https://medium.com/%40thatdeanjackson/an-amazing-9-word-email-that-revives-dead-leads-d1a1e97e5eea

https://businessblueprint.com/what-is-the-9-word-email-and-how-you-can-use-it-to-convert-more-leads/

https://blog.deanjackson.com/how-9-word-emails-fail/

https://doncrowther.com/email/dean-jacksons-9-word-email