You can always have a smallest-instance VM on your cloud/hosing provider of choice just for the IP and proxy all in- and outgoing traffic through there. You ca

You can always have a smallest-instance VM on your cloud/hosing provider of choice just for the IP and proxy all in- and outgoing traffic through there. You can get fancy with SMTP proxy that can hold on to undelivered messages if you want, or just use haproxy/nginx plus proxychains/tsocks.