To maintain the original formatting of emails during OLM to MBOX conversion, GainTools OLM to MBOX Converter is the most reliable option. It preserves every email formatting, folder structure, attachments & metadata exactly as they appear in the OLM file. It also performs a clean conversion without losing your email content. Whether you are moving to Apple Mail, Thunderbird & any MBOX-supported client, it ensures a perfect and formatting-accurate output. This makes the process smooth and completely worry-free for any user. Furthermore, this software offers a free demo version, which works on Outlook and Windows OS.