Outlook Keep Displaying an Error Message When I Try to Send A Message

There are a number of possible reasons why Outlook may be displaying an error message when you try to send a message. It could be due to an issue with your account settings, a problem with the connection to the email server, or an issue with your antivirus or firewall software. It may also be caused by a problem with the Outlook application itself. To troubleshoot the issue, you should first verify your account settings, check your connection to the email server, make sure that your antivirus and firewall software are not blocking the connection, and try running Outlook in safe mode.