Resolve Outlook Express can only receive messages that cannot be sent

Does your Outlook Express have an error indicating that the message could not be sent because the server refused to accept the sender's e-mail address when sending the message? Don't worry, you can solve it by following the method.

In the case where the email address is guaranteed to be typed correctly, to detect whether authentication is enabled by clicking "tools → accounts" one time in the Outlook Express main interface, clicking "Mail" in the pop-up window and selecting your account, then clicking "Properties → server" in turn. Finally, see if the "My server requires authentication" item is selected in the window, and if not, then we should select it. Then Outlook Express will be able to send an email.