What does the warning triangle with exclamation mark mean next to Inbox in Mail?
I have attempted to change my mail account from POP to IMAP. Even though I carefully followed my ISP instructions, it did not work. I now have a triangular symbol with an exclamation mark, next to 'Inbox'. All my emails that were in the 'Inbox' have disappeared. Likewise all my emails that were in my 'Sent' box have disappeared. And, I am not now receiving emails in 'Mail' although new ones can be read in my web mail.
Any suggestions please?
iMac (27-inch Late 2009), OS X Mavericks (10.9.5), 12GB 1067MHz DDR3