Friday, May 03, 2024

Exchange Online New External Recipient Rate Limit Changes

Microsoft Exchange team has announced that beginning in January 2025, Exchange Online will begin enforcing an external recipient rate limit of 2,000 recipients in 24 hours

This External Recipient Rate limit changes will imply in 2 phases as below,

  • Phase 1 - Starting Jan 1, 2025, the limit will apply to cloud-hosted mailboxes of all newly created tenants. 
  • Phase 2 - Between July and December 2025, we will start applying the limit to cloud-hosted mailboxes of existing tenants.
Organizations who are sending bulk External emails via Exchange Online should be aware about this upcoming changes and Microsoft team recommends to use Azure Communication Services Email Service solution for the same.

You can access the below articles for information on Azure Communication Services Email Service and Azure Communication Services Email's SMTP as a Service.

Couple of Essential articles on how to use ACS Email Service SMTP and SDK.

More details on the way on the upcoming Microsoft Build 2024: Azure Communication Services at Microsoft Build 2024

Also review the new service announced public preview of High-Volume Email (HVE) for Microsoft 365, which will aid Organizations to send bulk emails internally beyond the Exchange online limits.

Follow Exchange Team Blog Tech community Space for more updates.

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