If you want to import EML files into Mozilla Thunderbird without facing manual complications, you can use eSoftTools EML Converter Software for a simple and reliable solution. This tool allows you to load single or multiple EML files and convert them into Thunderbird-supported MBOX format quickly. After installing the software, select your EML files or folders, preview the email data with attachments, and choose the export option to MBOX. Once the conversion is completed, you can easily import the generated MBOX file into Thunderbird profile. The software maintains email formatting, attachments, metadata, and folder structure during the process, making it an easy and effective way to import EML files into Thunderbird without data loss.