I am trying to set-up Outlook on my Mac for one specific email account (for a home-based job), and I continue to get "an operation on the server timed out. The server may be down, overloaded, or there may be too much net traffic. Could not retrieve mail. Account name: "Att" Error -3259"

I do not have this new email synced with my MacMail at all. I am able to log into this new account when I am on-line, but Outlook will not respond to it. I downloaded all new updates this morning.

Thoughts?