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Microsoft Defender for Office 365 Blog
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Strengthening Email Ecosystem: Outlook’s New Requirements for High‐Volume Senders

Puneeth's avatar
Puneeth
Icon for Microsoft rankMicrosoft
Apr 02, 2025

This applies to Outlook.com - our consumer service, which is supporting hotmail.com live.com and outlook.com consumer domain addresses.

April 29th Update - Changes have been made to the action take on messages that do not meet requirements, please see details below. Introduction In an era where email remains one of the most widel...
Updated Apr 30, 2025
Version 4.0
awareness & training
email protection basics
Gagan3496's avatar
Gagan3496
Copper Contributor
Jul 03, 2025

Hi, what if spf/dkim has temperror?

Cdary's avatar
Cdary
Copper Contributor
Jul 03, 2025

It seems that emails have been rejected so far in the case of temperror and this is typically a problem, because the sender is not fully responsible for such random errors. This could also occur for DMARC temperror.