To download everything, go to Settings > General > Privacy and data in the web version of Outlook and click Export mailbox . Microsoft will then prepare a link for you to download your entire data history.
Sometimes, saving multiple emails at once into a single .txt file results in only the headers being saved while the message body is skipped. Download File hot_mail.txt
This is typically a plain text file containing email headers (Date, To, From, Subject) and the body of the message. Users often create these files when they want to: specific important emails locally. To download everything, go to Settings > General