What kinds of firewalls are supported to use the PC-to-PC voice feature?
Your firewall must support outbound TCP connections for the PC-to-PC voice feature to work. Most home firewalls and many corporate firewalls have this as their default setting.
Where's the Contact Customer Care button? With so many improvements to Messenger since the version you're using (lots more features and reliability), we figured you're ready to move up. So get your upgrade and with the new version, rest assured if you have questions, you’ll find that friendly button on its help pages.
Ask Other Messenger Users