I have a strange problem, since Sat 9th October I have not received any new emails on my iMac, however they are coming through to my iphone. I have pinged the email server from my iMac, and that comes back OK. All the account settings seem OK. I have also noticed a new symbol in the left hand side bar next to the inbox and other items as it changes from time to time. The symbol is a circle with the sector between 12 o'clock and 1 o'clock filled in. Any help and advise would be greatly appreciated.