Why can’t I send outgoing email through Qwest/CenturyLink?

=========ERROR MESSAGES:---------Outlook cannot connect to your outgoing smtp email serverIf you continue to receive this message contact your server administrator or Internet Service Provider =========RESOLUTION / NOTES:---------Several of our customers who utilize Qwest DSL as their ISP (Internet Service Provider) have called with issues where their email client is coming up with errors like cannot [...]