My email account on my iMac has recently started to repeatedly show a symbol that is a triangle with a circle and exclamation point inside.  When I click on the symbol I get the following message:

    ALERT:

    There may be a problem with the mail server or network. Verify the settings for account or try again. 

    The server returned the error: Mail was unable to connect to server “pop3.live.com” using SSL on port 995. Verify that this server supports SSL and that your       account settings are correct.

What do I need to do to fix this?  How do I verify the settings and verify that the server supports SSL?

Thanks for your help!