https://madnessmail.io/blog/ Notes for people running their own email infrastructure: warmup, authentication, list hygiene and delivery. en https://madnessmail.io/blog/smtp-ip-warmup-schedule.html https://madnessmail.io/blog/smtp-ip-warmup-schedule.html Mon, 13 Oct 2026 09:00:00 +0000 A week-by-week SMTP IP warmup schedule for self-hosted senders: starting volume, doubling rules, the two metrics that decide everything, and why pools beat one workhorse IP.