By Sergiu Gatlan
Publication Date: 2026-01-06 20:49:00
Microsoft announced today that it has canceled plans to impose a daily limit of 2,000 external recipients on Exchange Online bulk email senders.
The change was announced in April 2024, when Microsoft said that it would add new External Recipient Rate (ERR) limits starting January 2025 to fight spam, with plans to begin enforcing the limit on cloud-hosted mailboxes of existing tenants between July and December 2025.
As explained last year, this new Mailbox External Recipient Rate Limit was designed to prevent Microsoft 365 customers from abusing Exchange Online resources and to restrict unfair usage.
However, on Tuesday, Microsoft announced that the Exchange Online bulk emailing rate limit is being canceled indefinitely, following negative customer feedback.
“Customers have shared that this limit creates significant operational challenges, especially given the limited capabilities of bulk sending offerings available today. Your feedback matters, and we’re…