imap not receiving

imap not receiving

Our email domain loader.co.nz is not working 

Get this error

Task 'Synchronizing subscribed folders for ----- loader.co.nz.' reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders for !!!!!! loader.co.nz. Error: Cannot connect to the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

Have tried on different PC & Location

Still same

Can you advise

Thanks