Fraid not. E-mails are stored as entries in a kind of database file (eg inbox.dbx), not as individual files, so undelete utilities won't work. Your only hope is if you have a recent backup of your email folders.
I searched for "deleted items" with the search hidden files ticked and got three dbx files the first was 906k and dated 23/3/2003 so I opened it with notepad and found many emails I thought were long gone the last entry was dated today and held an email I have just deleted. This operation is for outlook 6 in XP.