3. This new window will look like the screen-shot in step 2 and will ask you for the account type of the mailbox, select 'POP'. You'll now need to insert the details for the 'Incoming Mail Server', you'll find this information in the email sent to you when the mailboxes are first set up, it should look something like mail.yourdomain.co.uk.
Please note that sometimes mail2 is used instead of mail, ensure that you're using the correct settings by checking the email you received with your log in information.
The user name and password fields underneath should be filled in with your full address (email@example.com) and the password for that address. Click 'Continue'.