@Jessendelft It receives and relays all your requests to the resource you want to access. The proxy server can change your IP address, country of location, and region in the process. Try https://soax.com/911-proxy-socks and make a reverse connection. The outgoing IP addresses of most free proxies have long been listed in various SPAM databases and blocklists. These addresses will be blocked on most popular resources, so there is no way to use these proxies for mailing lists or mass registration on social networks.