# Outlook's new requirements for high volume sender

**URL:** <https://forum.dmarcian.com/t/outlooks-new-requirements-for-high-volume-sender/2694>\
**Category:** News and Announcements\
**Created:** [April 3, 2025, 1:11pm UTC](https://forum.dmarcian.com/t/outlooks-new-requirements-for-high-volume-sender/2694 "2025-04-03T13:11:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Asher](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.dmarcian.com/asher/32/104_2.png) [@Asher](https://forum.dmarcian.com/u/Asher)\
**Post date:** [April 3, 2025, 1:11pm UTC](https://forum.dmarcian.com/t/outlooks-new-requirements-for-high-volume-sender/2694/1 "2025-04-03T13:11:22Z")

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Microsoft is stepping up its fight against phishing and spam with new DMARC, SPF, and DKIM requirements for high-volume senders. If your organization sends over 5,000 emails per day to Outlook, Hotmail and/or Live recipients, compliance isn’t optional— it’s a must to avoid possible email rejections and deliverability issues starting on May 5th of this year.

[Click here](https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog/strengthening-email-ecosystem-outlook%E2%80%99s-new-requirements-for-high%E2%80%90volume-senders/4399730) for the full article by Microsoft.

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**Author:** ![Asher](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.dmarcian.com/asher/32/104_2.png) [@Asher](https://forum.dmarcian.com/u/Asher)\
**Post date:** [April 3, 2025, 1:14pm UTC](https://forum.dmarcian.com/t/outlooks-new-requirements-for-high-volume-sender/2694/2 "2025-04-03T13:14:24Z")

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Pinned on April 3, 2025, 1:14pm UTC