Use Incredimail Files to PST Files utility to convert Incredimial IMM files into PST files format. The Incredimail Files to PST Files program helps you to convert files from Incredimail into MS Outlook PST file along with all the elements of IMM files (to, from, Bcc, Cc, attachments, images, etc). The software helps you to convert multiple IMM files into MS Outlook at a time.