AT&T delays Microsoft 365 email delivery due to spam wave

May 9, 2024 at 02:01PM AT&T’s email servers are blocking connections from Microsoft 365 due to a “high volume” spam wave. Customers are unable to receive emails from Microsoft 365 addresses, leading to multiple complaints on AT&T forums. AT&T attributes the issue to spam originating from Microsoft’s servers and is collaborating with Microsoft to address … Read more

Microsoft fixes connection issue affecting Outlook email apps

February 1, 2024 at 02:55PM Microsoft addressed a known issue causing connection failures for desktop and mobile email clients with Outlook.com accounts. They released service changes on January 31, 2024, addressing the authentication problem. Users experiencing sign-in problems reported issues on Microsoft’s community platforms. Additionally, Microsoft has resolved other past issues with Outlook.com, including client … Read more

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