High Volume Email is a new service for line of business applications and other high-volume SMTP scenarios that enables you to send internal messages beyond the current limits of Exchange Online.
Roadmap › 382633
Exchange: High Volume Email for Microsoft 365
- General availability
- 2026-03
- Preview
- 2024-04
- Added
- 15 Feb 2024
- Last modified
- 20 Apr 2026 22:45 UTC
- First archived
- 25 Aug 2026
- Release rings
- General Availability, Preview
- Clouds
- Worldwide (Standard Multi-Tenant)