You could think about hosting some ready-to-use-software such as https://mailcow.email/ https://mailcow.email/ on a VPS. That's an open source Mailserver soluti

You could think about hosting some ready-to-use-software such as https://mailcow.email/ https://mailcow.email/ on a VPS. That's an open source Mailserver solution based on docker. Some providers offer VPS with ~TB of storage for ballpark number 15€ (or $15) per month. Of course you could also host this on a private raspberry in your home, basically for free... Especially if you only use the mail account for backup.