Download Outlook OST Files to EML by excerpting the given techniques and solutions which have two main manual ways where Windows live mail or Gmail-like email clients and a single automatic way but with a variety of options.

Method ( using Gmail and Thunderbird )

1. Configure your Gmail in Outlook > Enable Forward IMAP Settings > Sync the Gmail account on Outlook.

2. Drag & Drop the OST files to Gmail inbox > Install Mozilla Thunderbird and configure the same Gmail account > Once synced, select the emails > right-click and choose "Save As" to export them as EML files.

Method ( Take help Windows Live Mail )

1. Install the Windows Live Mail and Sync it with OST > go to File > Import Messages > Microsoft Outlook > Select the emails you want to import from the OST file.

2. Export as EML: After importing, select the emails, right-click, and choose "Save As" to save them in EML format.

Method ( Convert OST to EMl by Converter Tool )

1. Download a professional EML Converter Tool like WebbyAcad OST converter tool.

2. Add the OST files.

3. Preview the OST Mail data.

4. Select the EML File format.

5. Set the destination of the file saving path and export the files.

These all methods give you the proper result you want but everyone has their key features and demerits.

Read Also:- https://www.webbyacad.net/blog/expert-tips-on-how-to-convert-ost-files-to-eml-file-format-easily/