Le Tue, Feb 24, 2026 at 12:45:09PM +0000, Gellner, Oliver via mailop [[email protected]] a écrit: > > Microsoft's spam handling is broken, simple as that. No need to > > argue about that. > > We receive the same error messages for all servers since 2026-02-23 > 18:45 UTC. It's unlikely that Microsoft suddenly received spam from > all IP addresses of all kind of unrelated organizations yesterday > evening. Probably some algorithm went nuts there.
Browse the list archives. Those errors when sending to "outlook" adresses run for a while now. Seems like they made new rules with dynamic throttle, which nobody understands for now. For the servers (low volume) I run which encountered the probleme I limited to one SMTP connection every 10s. ( which would probably bothersome for quit high volume sender, OK for us ) -- Dominique Rousseau Neuronnexion, Prestataire Internet & Intranet 6 rue des Hautes cornes - 80000 Amiens tel: 03 22 71 61 90 - fax: 03 22 71 61 99 - http://www.neuronnexion.coop _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
