well, there was this, a while back: "experiencing a critical and recurring email delivery issue affecting recipients at outlook.com, live.com, hotmail.com, and

well, there was this, a while back: "experiencing a critical and recurring email delivery issue affecting recipients at outlook.com, live.com, hotmail.com, and msn.com" "Emails to Outlook.com rejected due to a fault or overzealous blocking rules" https://www.theregister.com/2026/03/04/users_fume_at_outlookcom_email/ https://www.theregister.com/2026/03/04/users_fume_at_outlook... discussed here: https://news.ycombinator.com/item?id=47246044 https://news.ycombinator.com/item?id=47246044