Microsoft: Some Outlook.com users can’t send emails with attachments
November 7, 2023 at 12:08PM Microsoft has issued a warning to Outlook.com users about possible difficulties when sending emails with attachments. Error code 550 5.7.520 may appear, preventing emails from being sent. Microsoft suggests users upload files to OneDrive and share the link instead. Step-by-step instructions are provided as a workaround until the issue is … Read more