mboxviewer VS got-your-back

Just use the takeout feature to download a copy of your emails as mbox. Then you can use any email client to load the file. You can also use mboxviewer if you just want to read the emails.

Location: https://github.com/eneam/mboxviewer

mboxviewer does all kind of operations on mbox files, including searching and exporting one or messages or attachment as eml or converting to text/pdf https://github.com/eneam/mboxviewer

Got your back is the right tool https://github.com/GAM-team/got-your-back/wiki

alternatively, give them access to the user account and have them use Got Your Back ( https://github.com/GAM-team/got-your-back )

This tool from the creator of GAM will allow you to purge a mailbox: https://github.com/GAM-team/got-your-back

THe information it gives is inaccurate and it can sometime just stop. never had a good experience with it. for a couple accounts I'd go for GYB - https://github.com/GAM-team/got-your-back

GYB - gmail backup tool (I use the linux version, but it does have a version for mac).

if you don't want to spend you can also get only emails with "got your back". https://github.com/GAM-team/got-your-back

Either Google Takeout for everything, or GYB (got-your-back) https://github.com/GAM-team/got-your-back for email. You can try GAMADV-XTD3, but it can be super complex and I’m not sure if a standard account can use it or if you have to be super admin.