Using IncrediMail Conversion tool users can Export Email from IncrediMail to Thunderbird perfectly. With batch conversions mode, users can export unlimited IMM files to Thunderbird mbox at once. The IncrediMail to Thunderbird is resourceful utility to convert IMM file into mbox Thunderbird. The IMM to Mozilla Thunderbird tool Export Emails from IncrediMail to Thunderbird with entire emails attributes – attachment, layout, hyperlinks, etc.