Stricter requirements for mass mailings to Microsoft mailboxes
Stricter requirements are coming on mass mailings to Microsoft hosted mailboxes including Outlook.com. The new rules also affect anyone with a Microsoft managed Inbox. Any organization (domain name) sending “over 5,000 emails daily” will have to comply with new rules from 5 May 2025. At the same time, Microsoft is changing how ‘unverified’ emails are […]