Yes, heavy MSG files can be converted to EML without losing email data but the method of conversion matters. If the MSG file is corrupted, incomplete or converted using a weak converter, attachments, HTML formatting, sender details or message headers can be lost in the process.
A few things should be checked before conversion:
- Open the large MSG file and check that the email body and attachments are visible.
- Create a backup copy of the original MSG file.
- I'm not going to rename msg to eml; it's not a real conversion.
- Use a method that previews the email contents prior to saving the EML output.
For large MSG emails where data accuracy matters, a safe option to consider is
Datavare MSG to EML Converter Expert. It supports large MSG files, shows a preview of email properties, keeps attachments and formatting and saves the converted EML files locally without requiring Outlook.
Start with a few heavy MSG files in the demo version and check the output in Thunderbird or Apple Mail before processing all files.
