My iPad and iPhone is receiving mail, but not my iMac Pro. Why?

My iPad and iPhone is receiving mail, but not my iMac Pro. Why?

Is they?

Do you know what type of account you are using? If its a POP account, this is not able to update your mail on all of your devices. You can optimize these settings with your service. If its an IMAP account, try signing out of your account on your iMac and then signing back in.