Exchange Online external recipient limits are coming
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Microsoft recently announced that Exchange Online -- the email (and calendar, contacts and tasks) functionality provided in Microsoft 365 and Office 365, will be subject to outbound email rate limits as of January 2025. That "external recipient rate limit" will be 2,000 recipients every twenty-four hours. Though the note on limits suggests that users needing to send larger volumes of mail might want to consider Azure Communication Services for Email, another article covers options for High Volume Email Sending for Microsoft 365. The high volume option still seems to have limits -- 100,000 external recipients per day -- suggesting Microsoft is perhaps looking to enforce that this is meant to be a platform to handle 1:1 communication (with a large number of mailboxes, and at scale, if needed), but not meant to be a substitute for a broadcast email service provider or marketing automation tool.
Microsoft recently announced that Exchange Online -- the email (and calendar, contacts and tasks) functionality provided in Microsoft 365 and Office 365, will be subject to outbound email rate limits as of January 2025. That "external recipient rate limit" will be 2,000 recipients every twenty-four hours. Though the note on limits suggests that users needing to send larger volumes of mail might want to consider Azure Communication Services for Email, another article covers options for High Volume Email Sending for Microsoft 365. The high volume option still seems to have limits -- 100,000 external recipients per day -- suggesting Microsoft is perhaps looking to enforce that this is meant to be a platform to handle 1:1 communication (with a large number of mailboxes, and at scale, if needed), but not meant to be a substitute for a broadcast email service provider or marketing automation tool.
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