Go into your Google account settings. Enable IMAPs. Use an IMAP client such as Thunderbird to download all your emails. Create an account on a mail server el

Go into your Google account settings. Enable IMAPs. Use an IMAP client such as Thunderbird to download all your emails. Create an account on a mail server elsewhere. In your Google settings, create an email forwarder to the new email address. Optionally use your IMAP client to push your Google emails up to the new email server. Optionally copy all your emails to local folders and back them up to USB SSD drives. The new mail provider may have options to ignore the relay host in your spam rules should you wish to reduce the risk of emails forwarded from Gmail being flagged as spam. Get the Google relay host DNS names from your email headers.