Repeated Account Blocked events

Request the review through Outlook.com’s in-product support while the account is unblocked and accessible: Help → Help → describe the repeated blocks → Still need help? → Yes.

Submit the review request

1. Sign in to Outlook.com in a web browser.
2. Select Help on the top menu, then Help again.
3. In Search Help, enter:
   Repeated account blocks after sending committee email
4. Press Enter. If the suggested articles do not resolve it, scroll to Still need help? and select Yes. If that option is hidden after opening an article, use the back arrow in the Help pane. This submits an email support request for Outlook.com ^1^.
5. Include:
   • The exact warning or error text.
   • Dates and approximate times of recent blocks.
   • Whether the entire account was locked or only outgoing email was restricted.
   • The approximate recipient count—35 committee members.
   • Whether recipients were placed in To, Cc, or Bcc.
   • Whether the message contained attachments or links.
   • That access can be restored through the normal unblock process, but the event repeatedly returns.

Support may not permanently exempt a consumer account from automated security or anti-abuse controls, but this is the documented channel for requesting an Outlook.com investigation.

Reduce the likelihood of another restriction

Outlook.com limits both daily recipients and recipients per message to protect against spam. For Microsoft 365 subscribers, the documented maximum is 5,000 daily recipients and 500 recipients per message, but limits can vary with account history and are lower for non-subscribers ^2^. Therefore, 35 recipients is below the published subscriber maximum, but that alone does not guarantee that a message will not trigger a restriction.

Apply the preventive measures Microsoft lists:

• Add the committee members to Outlook.com Contacts.
• Keep the account’s recovery telephone number, alternate email, and profile information current.
• Use a strong, unique password.
• Use Microsoft Authenticator.
• Communicate regularly with those contacts rather than sending only occasional identical bulk messages ^2^.

If the messages include minutes as attachments, keep each attachment below Outlook.com’s documented 25 MB limit, or share it through OneDrive instead ^2^.

If the account becomes blocked again

Microsoft documents that an Outlook.com account can be temporarily blocked after unusual sign-in activity. The supported unblock procedure is to reset the password and complete the requested identity verification ^3^.

If the block prevents sign-in, Outlook.com support cannot handle the sign-in problem through the mailbox Help pane; use the Microsoft account sign-in helper referenced by the support article instead ^1^.

For recurring communication with more than 600 members, use a dedicated mailing-list or membership-email service rather than sending large distributions from a personal Outlook.com mailbox. Continue using Outlook.com for ordinary committee correspondence, but move newsletters and society-wide notices to a service designed for bulk or subscription-based mail.

References

1. How to get support for Outlook.com | Microsoft Support
2. Sending limits in Outlook.com
3. Unblock my Outlook.com account | Microsoft Support