Is the need for 2-step auth for account changes a documented feature? I'm asking because I couldn't find anything pointing to that and, if so, it could solve my initial problem.
Is not so much about me trusting the company but being sure nothing can be done outside the scope I trust it, even if by mistake. It is also, from my point a view, a failure from Google to provide a more granular access to its services.
Did you personally use the import tool (assuming you previously used Gmail)? I assume everything worked smoothly?
Completely agree on the granular access issue, companies with much smaller engineering teams manage to do it!
I did use the import tool with no trouble but it was about 10x less data than what you have.
Given the 2.5GB/day bandwith cap of the gmail API/IMAP you might really be better of with the takeout option though, doing the whole operation from a machine possibly in a datacenter with a good uplink.
