To manage your sizable email accounts without hiring additional server space from your VPS for tens of Old emails (20Gb+), you can set up self-hosted IMAP archiving using, for example, Dovecot on your own server. You can still send/receive emails using your VPS and if multi-user access is needed, a self-hosted webmail server such as Roundcube or Rainloop can be deployed. These would allow you and other members of your family to retrieve the archived online emails and compose new ones using the VPS SMTP credentials in a manner similar to the filling in of a POP3 email account on Gmail or Outlook for accessing VPS emails. This allows you to house email accounts on your VPS but relocate the archived emails.
To manage your sizable email accounts without hiring additional server space from your VPS for tens of Old emails (20Gb+), you can set up self-hosted IMAP archiving using, for example, Dovecot on your own server. You can still send/receive emails using your VPS and if multi-user access is needed, a self-hosted webmail server such as Roundcube or Rainloop can be deployed. These would allow you and other members of your family to retrieve the archived online emails and compose new ones using the VPS SMTP credentials in a manner similar to the filling in of a POP3 email account on Gmail or Outlook for accessing VPS emails. This allows you to house email accounts on your VPS but relocate the archived emails.