My msn account says it cannot connect to server when using Outlook but I receive e mail on my iPhone and when I log directly into MSN. Help

Ongoing problem with sending/receiving e mail via OUtlook. My MSN account, which worked fine as a HotMail account, now is unable to send/receive because "cannot connect to server". I am receiving and sending without issue on my iPhone and when I log in directly to MSN. Only have issue when using Outlook so trying to find solution before deleting Outlook and losing all my data/contacts, etc.