MailSteward will archive all of your email in a database for easy retrieval. Click on the Store Email button and MailSteward will go to work storing copies of all your email text, HTML, attachments, and raw source, into a relational database file. MailSteward has a wealth of features for importing, tagging, saving, and exporting, including the ability to export your vital email information to a number of standard data formats.
If you are running OS X 10.11 or later, and you are using the macOS Mail program, or can export mbox files from Microsoft Entourage, or other email clients, and you have thousands of emails to keep track of, then MailSteward is exactly what you need.
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