Malinda Terreri's article on email deliverability practices sparked a detailed discussion about how email providers track sender behavior and reputation, covering factors like bounce rates, unsubscribe rates, spam complaints, and shared IP server dynamics. The thread highlights that email deliverability depends on multiple tracked behaviors beyond just spam filtering, and that senders should segment email types, monitor their IP sender score, and clean their databases carefully to maintain good reputation. A key insight is that Gmail and Yahoo can track opens and clicks directly on their platforms without additional tracking code, and that a single bad sender on a shared IP can damage deliverability for all users on that server.
