For latest updates on HVE, please also see this post.
High Volume Email (HVE) for Microsoft 365 allows customers to send large volumes of email, primarily to internal recipients without any recipie...
Updated May 06, 2025
Version 3.0
Blog Post
Great news but we really need a higher limit than 2000 for external recipients to make this a valid replacement för other SMTP solutions.
Simone_Liebal
Microsoft
MicrosoftJonasBack Thank you for your feedback! High Volume Email is primarily intended for internal bulk email, for external bulk mail of volumes beyond 2,000 per 24h windows, please consider leveraging Azure Communication Services, as it provides the solution for high volumes of external email.
ACS doesn't support message encryption and mail flow rules. It is not a viable alternative before secure mail can be implemented.
