grayed out Time Machine
Hi
My Time Machine back-up drive was disconnected and I've accidentally deleted an important Mail folder which I'd like to retrieve.
On entering Time Machine I can see all of the emails that I want to restore and they all load OK in the preview pane below. However the 'restore' button is grayed out.
Also if I exit Time Machine and then reenter, none of the emails can be viewed, I assume because it updates to the actual situation.
I know all of the emails are in the system somewhere as I can see them, but how can I get them back into my Mail folder?
Many thanks for your help.
Grant
iMac 27″, macOS 10.13