Hello Team, About a month ago Thunderbird stopped downloading new messages, on my desktop pc. I have a Cox email account, and about a year ago they switched to using Yahoo. It's been working fine until last month. When I open TB, the inbox count of unread messages keeps climbing, but it's not adding new emails. I think it's actually adding duplicates of already downloaded emails. Some of which it looks like it is adding several copies, like 3 or 4. Can you tell me where to start? Many thanks.