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OR download and install a Lotus Notes email recovery program but there r few free options available, but many of the paid programs also work with other programs.
Assuming the issue is that you want her deleted msgs to go to the trash, rather than you needing to recover a specific deleted msg, you should first look at the database properties of her mail file. So, right click in her mail file and choose properties. If the dropdown at the top of the box that pops up says “Document” or something other than “Database,” change the dropdown selection to “Database.” Go to the last tab (the icon is a propeller beanie cap). Make sure the checkbox labeled “Allow soft deletions” is checked. You can then also set the number of hours that msgs stay in the trash before they are automatically purged.