In your Outlook Mail, you might not be able to send messages. It could be due to entering the wrong recipient’s email address, network problems, or using an outdated Outlook version. If that is the case, you can try these practical solutions to have the issue fixed without any stress: Check if the Outlook Mail is Online The Outlook Mail may be running in offline mode, and that could be the possible reason why emails are failing to send. To check if Outlook is offline: Go to t