If you use Apple Mail follow these instructions to configure you email client:
Open Apple Mail if it’s not already open
Select Mail, then Preferences from the menu at the top
Click the Accounts button
Click the + sign in the list of Accounts
Enter the following details:
Full Name: Your name
Email Address: Your Email Address
Password: Your email Password
Click Continue
On the Incoming Mail Server Page set the following:
Account Type: IMAP or POP3 (IMAP will leave the messages on the server allowing you to share the mailbox between multiple clients, please note this will use your hosting disk space quota up).