FOSS Tools for Forensic Email Extraction

I'm relatively new to the forensic game and try to get some practice in my freetime. My latest project is to learn different ways to extract emails. Not only by coping them from a local database (like a pst/ost file from outlook) but eventually also by downloading them from a remote server (if i have access to the login credentials and maybe 2FA). Are there any tools that can do it forensically and export it to a "forensic container", that …

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