Fix your attention on more important things and do not bother with lists of proxy IP addresses. Soxy has a handy control panel that will do everything for you by creating a list of IP addresses according to your settings.
Our authentication process is very simple. After registering, you will receive a simple combination USER:PASS, which must be used for authentication. That's all you need to do.
Email security should be performed regularly and continuously when necessary. Protect your email with Soxy, our system almost never fails.