Thank you for the welcoming help!
I found a path indeed (Computer > ACER (C
> Users > My Name > AppData > Local > Microsoft > Outlook).
Would that mean if I would find this folder in my back-ups, I would find my old emails? (I assume the file that is in this folder right now, includes the e-mails from after the hard reset.)
There is another option as well. I back-upped my Nokia E72 regularly, and my e-mail was there as well (disappeared after the hard reset). Would restoring a phone back-up possibly bring back my old e-mails?
Thank you very much for thinking along. I am looking forward to your response.