bayesian-basics

Email deliverability fundamentals and best practices

Bayesian Filtering History Paul Graham Plan for Spam 2026

Learn the true origin of Paul Graham’s Plan for Spam and how Bayesian filtering shaped modern email verification.

Inbox placement by mailbox provider: Gmail, Outlook, Yahoo and spam filters

How Bayesian Spam Filters Learn from Recipient Training in 2026

Discover how Bayesian spam filters adapt using recipient feedback. Learn the mechanics, limitations, and how email verification improves training data.