Heard about good tool which recover mails-
microsoft pst file viewer,program is free as far as I know,utility will help you to restore your data from files with *.pst and *.ost extension,tool will work under all supported versions of Microsoft Windows operating system, as well as with Microsoft Outlook,can retrieve all contents as a number of files in *.vcf, *.txt and *.eml formats,will extract thousands of different files, that will be placed into any folder, upon your choice,converting of recovered data into a *.pst file, that can be opened by any mail client or viewer .pst file, compatible with Microsoft Outlook, file size will not exceed 1Gb.