Mail - "downloading messages. 914 new messages"
I was gone over the weekend and had turned off all Rules and picked up my email just fine on my iPad == I just came back and started. up my iMac and the message at the bottom of the L pane is "downloading messages. 914 new messages" -- what does this mean and what can I do?? I opened Activity in Mail and it's blank. The 914 number hasn't budged. Most of my email is via my .MAC address and a few from a second one.
iMac 27″ 5K, macOS 10.14