Re: Delete Warning/Confirmation in Thunderbird?
Sorry, I can't find any way of doing that. Hang on for some more replies. We have a few Mozilla users here who might be able to help.
In the meantime, if you want to be able to recover any accidentally deleted messages, they are sent to the Deleted folder, so you can just drag them back to where they belong. Or use the Undo feature (Ctrl-Z or Edit>Undo).
You might also want to disable 'Empty Deleted folder on exit' under Tools > Account Settings > Local Folders > Message Storage, to prevent messages accidentally being permanently deleted when you shut down Thunderbird.
If you want a fool-proof alternative to Thunderbird, you could set up Googlemail for her, using either a new gmail account or import her current email account details. I use it for both gmail and regular email, and find it much easier to use than other email clients, with no risk of losing anything.