A User is unable to send emails using Windows Live Mail.
The user's OS is Windows 7 Home Professional.
The user is using a POP3 email account which is configured correctly. We have used these same POP3 email settings on a Windows 7 Professional computer with Outlook 2010 and have been able to send and receive email without any problems at all.
I have checked and the user's external IP address is not on any blacklists.
What do I need to do to fix this issue so that I will be able to send and receive email without any problems at all?