MC239262 – Enforcing mailbox receiving limits

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check before: 2021-02-27

Product:

Exchange

Scope:

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Platform:

Online, World tenant

Links:

Details:

We are updating the way we enforce our receiving limits in Exchange. Starting in April 2021, we will be more strictly enforcing limits across all mailboxes to protect the health of our systems and ensure optimal mail flow performance for all customers. Mailboxes that receive high message volume in a short time can cause mail flow delays, both for individual recipients and across your organization. With these changes, emails will be throttled for recipients that exceed our published and established threshold of 3600 messages per hour. While this is not a new limit, it has been a soft limit before ? we?ve ensured up to 3600 but in some cases supported higher volume. We are now making this a hard limit.

Change Category:
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Status:

Ring:

Created:
2021-02-13

updated:
2021-02-13

Change type:
Admin impact, User impact

task type:
Awareness Plan For Change

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