check before: 2026-03-01
Product:
Exchange, Microsoft 365 admin center
Platform:
Online, World tenant
Status:
In development
Change type:
New feature, User impact, Admin impact
Links:
Details:
Summary:
Microsoft 365 is introducing High Volume Email (HVE) for large-scale internal communications, available now in Public Preview and generally available March 2026. HVE offers dedicated SMTP endpoints, new admin controls, and reporting, with a transactional pricing model starting May 2026 after a free promotional period.
Details:
[Introduction]
Exchange Online includes email‑sending limits based on three factors: recipient rate limit, recipient limit, and message rate limit. To support customers whose internal communication needs exceed these standard limits, we are introducing High Volume Email (HVE) for Microsoft 365. HVE is designed for large‑scale internal communications and integrates with business applications and devices to support operational and mass‑mailing scenarios. It uses a transactional pricing model based on the number of recipients.
HVE is available at no additional cost during Public Preview. Pricing for General Availability (GA) will be announced with the GA release, and billing will begin in May 2026 following a free promotional period after GA in March 2026.
This message is associated with Microsoft 365 Roadmap ID 382633.
[When this will happen]
Public Preview: Available now.
General Availability (worldwide): Rollout begins in late March 2026 and is expected to complete early April 2026.
Change Category:
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Scope:
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Release Phase:
General Availability, Preview
Created:
2026-03-04
updated:
2026-03-04
Public Preview Start Date
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Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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Pictures
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summary for non-techies**
Microsoft 365 is introducing a High Volume Email (HVE) feature, currently in Public Preview, to facilitate large-scale internal communications by allowing organizations to send more emails than usual, with full availability and pricing starting in March and May 2026, respectively.
Direct effects for Operations**
High Volume Email Implementation
Without proper preparation, admins may struggle to manage the new High Volume Email accounts and reporting features, leading to potential mismanagement of email flows and increased risk of email delivery issues.
- roles: Exchange Admin, IT Support
- references: https://learn.microsoft.com/exchange/mail-flow-best-practices/high-volume-mails-m365, https://www.microsoft.com/microsoft-365/roadmap?searchterms=382633#Roadmap
User Experience with High Volume Emails
Users may experience delays or disruptions in email communications if the new High Volume Email feature is not properly configured, impacting their ability to receive important internal communications.
- roles: End User, Business Analyst
- references: https://learn.microsoft.com/exchange/mail-flow-best-practices/high-volume-mails-m365, https://www.microsoft.com/microsoft-365/roadmap?searchterms=382633#Roadmap
Configutation Options**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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