Mail program blocking one account
I have two email addresses, one BT, one Gmail. I view incoming emails not direct but through the Mac Mail program.
Suddenly, the Mail program has stopped showing mails from gmail. Also, all mails I had previously received from Gmail have disappeared from the Mail program. I have checked the Accounts section in System Preferences and both the BT and the Gmail accounts are selected,
Incidentally, at the top of the Mail program above the column showing read and unread emails, it says: inbox - btinternet. No mention of Gmail.
Any ideas, anyone?