.IMM to .EML conversion is not possible if users do not use an IMM to EML conversion tool. The tool to Convert .IMM to .EML is Incredimail to EML converter. Using this utility users can open there IMM files in Windows Mail, Windows Live, Thunderbird, OE, Entourage, Mac Mail, etc. For converting .IMM to .EML this program is apt as it also offers batch conversion facility.