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Sending limits in Outlook.com. Important: From February 1, 2023, we are making changes to storage. Learn more. To help protect against abuse by spammers, Outlook.com limits the number of email messages that you can send in a single day, as well as the number of recipients for a single message.

We've put together this article to describe fixes for the most common problems. Your Azure Active Directory (Azure AD) organization can turn on two-step verification for your account. When two-step verification is on, your account sign-in requires a combination of the following data: Your user name. Your password.