[statusfailed]

This lets other family members send emails too, and has an interface everyone is familiar with.

[unnouinceput]

Which can in turn be automatically parsed and pull the data into said document. So when Google decides that the mail/workspace account is banned for whatever reason they deem, you don't lose the content, you just change the automation tool to the new e-mail address (and inform relatives about the new e-mail as well).

[bjord]

it might be enough just to have a headless email client logged in on a personal server somewhere that pulls down incoming emails, and can act as a backup in a pinch