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Cold Email Confessions is a newsletter by Richard Illingworth focused on the practical realities of cold email infrastructure, deliverability, and scaling. Drawing on experience managing more than 200,000 inboxes, Illingworth shares lessons from the problems and failures he has encountered, offering an unfiltered perspective on what it takes to get cold emails into recipients’ primary inboxes. The newsletter is aimed at people and teams who want to improve cold email performance without spending hours troubleshooting deliverability.

It is particularly relevant to agencies, with the publication reporting that more than 2,000 agencies trust it. Cold Email Confessions is available as a free weekly subscription, with no spam and the option to unsubscribe at any time. The brand also displays a 4.

9 out of 5 rating from more than 340 reviews. Its central offering is informative email content about cold email operations, helping readers better understand the infrastructure and practices involved in running campaigns at scale