All of my email gets forwarded through Gmail, Outlook, then to my personal, self-hosted email. At least 3 coppies of each email are saved on different services. Google have hated me since they closed my Google Wallet account for “suspected fraud” with no further information or legal action, which is a requirement for the accusations in England. It’s a pain in the backside having to check the account from which I need to reply and it breaks the chain on many occasions, but well worth the redundancy!