Question about Outlook Express

Over the last week I have not been able to access my emails via my mobile phone.  I have contacted Sony and they have suggested that because of the change from Hotmail to Outlook this could be causing the problem.  I get an error message saying "unable to connect to server".  I have deleted my email account and tried to reinstate a new one only to get the above error message.  Please investigate and advise.  Also, could you provide the correct settings for the email account.