High Volume Email
The latest High Volume Email coverage — news, analysis, and updates from the WindowsNews.AI desk.
Exchange Online High Volume Email Reaches General Availability: What It Means for Enterprise Automation
Microsoft has announced General Availability for Exchange Online's High Volume Email feature, a significant development for organizations that rely on automated internal email communications. This...
Microsoft Slaps 100-Recipient Daily Limit on onmicrosoft.com Outbound Email to Thwart Spammers
Microsoft is pulling the plug on unrestricted outbound email from its shared onmicrosoft.com domains, imposing a hard cap of just 100 external recipients per tenant every 24 hours. The change,...
Microsoft Caps onmicrosoft.com Emails at 100 External Recipients Per Day — Enforcement Starts October 15
Microsoft will begin throttling emails sent from the default onmicrosoft.com domain to just 100 external recipients per day, starting with trial tenants on October 15, 2025. The limit is a hard cap...
Microsoft Slashes onmicrosoft.com Outbound Email to 100 Recipients Daily to Fight Spam
Starting October 15, 2025, Microsoft will begin enforcing a hard cap of 100 external email recipients per 24 hours for all tenants sending from the default onmicrosoft.com domain. The move, announced...
Optimizing Internal Communications with Microsoft 365 Exchange Online High Volume Email
Modern enterprise environments thrive on the rapid, reliable dissemination of information. Whether this involves pushing automated IT alerts, distributing critical system notifications, or sending...
HVE Basic Auth Support Extended to 2028; Internal-Only Restriction Begins June 2025
Microsoft Extends Basic Authentication Support for High Volume Email Service Until 2028 with Key Updates Introduction Microsoft has announced significant updates to its High Volume Email (HVE)...
Microsoft's 2025 Email Overhaul: Mandating OAuth for All Automated Flows
For decades, enterprise email systems operated under an implicit trust model for internal communications, a paradigm Microsoft is decisively shattering with its 2025 High Volume Email (HVE) program...
Microsoft 365 High Volume Email Changes: Security, Migration & Impact
For enterprises deeply embedded in the Microsoft ecosystem, the rhythm of corporate communication is undergoing a seismic shift—one that fundamentally alters how organizations send high-volume...
Microsoft Enhances High Volume Email Service with Internal-Only Focus and Extended Authentication Support
Microsoft Enhances High Volume Email Service with Internal-Only Focus and Extended Authentication Support Microsoft has recently announced significant updates to its High Volume Email (HVE) service...