The best and secure way to save corrupt OST file into HTML with attachments is to use the professional tool like Data Recovery Freeware OST viewer freeware. But you might be think is why I'm recommending you this tool and why I'm not suggesting you the manual method to save corrupt OST file into HTML with attachments. So, there are lots of reason why I'm not recommending you to use the manual method so the reason is manual method is not working with the corrupt OST file in addition the chances of loosing data is also increased. 

Professional Methos to save corrupt OST file into HTML with attachments

- Download and lauch the OST file viewer software.

- Then click on the open button to choose the OST file and click on the open button. 

- After this select the scanning mode.

- After choosing the scanning mode click on the open button to start the scanning processs. 

- Now you can view the OST file with attachements.

- Click on the log button to view the log of OST file. 

- Lastly click on the log button to exit the software