If you are trying to batch
convert multiple EMLX files to MBOX efficiently, use a specialized tool
Aryson EMLX Converter. First, download and install the software on your computer. Open the tool and select the option to add multiple EMLX files or an entire folder containing your emails. Preview the emails to ensure they’re correctly loaded. Next, choose MBOX as the output format. You can apply filters like date range or remove duplicate emails if needed. Finally, click the convert button to start the batch process. This automated method preserves the original folder hierarchy, attachments, and email formatting, ensuring a smooth migration to MBOX-compatible clients like Thunderbird without data loss or corruption.