Outlook not sending emails

If Outlook is not sending emails, there are several steps you can take to troubleshoot the issue:

1. Check Email Account Settings: Ensure that your email account is configured correctly. You may need to verify the incoming and outgoing server settings, including the authentication methods used.
2. Enable Authentication: If you receive an error message indicating that none of the authentication methods are supported by your server, you may need to enable the option to log on to the incoming server before sending mail. This is often required by ISPs for SMTP authentication.
3. Repair Outlook: You can try repairing your Outlook application. This can resolve issues caused by corrupted files or settings.
4. Update Outlook: Ensure that your Outlook client is up to date. Outdated software can lead to connectivity issues.
5. Check for Third-Party Interference: Sometimes, third-party applications can interfere with Outlook's ability to send emails. Use tools like Process Monitor to identify any processes that may be causing issues.
6. Run Microsoft 365 Diagnostics: If you have a Microsoft 365 account, you can run diagnostics to check for connectivity issues and get potential solutions.
7. Check for Service Issues: If multiple users in your organization are experiencing problems, check the Microsoft 365 Service health status to see if there are any ongoing issues with Exchange Online.

By following these steps, you should be able to identify and resolve the issue preventing Outlook from sending emails.

Hi David Wolons, I get how frustrating this must be—when Outlook suddenly stops sending emails it can really disrupt your workflow, especially if you rely on it for important communication.

If Outlook stops sending emails start by checking your Send/Receive settings then clear the Outbox cache. You can also refresh mail settings by running outlook.exe /cleanmailtips or /resetfolders remove old credentials in Credential Manager and if all else fails create a new Outlook profile to fix hidden issues.

When Outlook stopped sending emails did you notice any error messages or are the emails just sitting in the Outbox without moving?

Best regards

Lucky Charm