if you use linux and network-manager, check "random mac" box for that connection, add post-connection-hook to `curl` with post data; use $RANDOM for mail addre

if you use linux and network-manager, check "random mac" box for that connection, add post-connection-hook to `curl` with post data; use $RANDOM for mail address, even use root.$RANDOM@localhost.localdomain probably it will authenticate you.