MessageExport
Extract Outlook Email: How to Save Your Outlook Email to Other Formats?
If you need to extract important email addresses in your Outlook email inbox, or your pst file, here are a couple of ways you can do that.
Method 1
PST Viewer Pro is a pst viewer software application for Microsoft Windows. You can use PST Viewer Pro to open your Outlook emails and then extract them to a comma separated values .csv file. You can then import the file into Excel or Open Office, where you can manipulate the eliminate the fields you don't want, and sort the email addresses. PstViewer does not require the presence of Outlook.
Method 2
MessageExport is an add-in for Microsoft Outlook 2013/2016/2019/365 that will extract your selected emails to many different formats, including .csv comma separated values that can be imported into Excel.
If you have hundreds or thousands of Outlook email messages to convert, you will need a flexible tool like MessageExport for Outlook.

With MessageExport, you can extract, format, convert, copy and process selected Outlook email messages and folders in a variety of formats including:
Supported Email Export formats:
Outlook to MBOX | Yes |
Outlook to MSG | Yes |
Outlook to EML | Yes |
Outlook to HTML | Yes |
Outlook to MHT | Yes |
Outlook to PDF | Yes |
Outlook to GIF, TIF, PNG | Yes |
Outlook to TXT | Yes |
Outlook to CSV | Yes |
A free trial for MessageExport can be downloaded that will let you determine if it is a good fit for your project.
Learn more about MessageExport for Outlook and start extracting your email content to useful formats.