Name
Give the proxy a descriptive name. It can even be the same as the value in the Proxy Server field.
SMTP or HTTP
Select whether the proxy is for SMTP or HTTP connections. Both protocols can be defined in the same profile.
Proxy Server
This is the actual address/name of the proxy server. It could be an actual IP address or a server name.
Port
All proxies listen on specific ports. Indicate the port your proxy listens on here.
Socks
Is this a Socks proxy? If it's for SMTP it MUST be a socks proxy. If HTTP it could be either a socks proxy or HTTP proxy. If HTTP proxy, Socks should be set to no. If it's a Socks proxy, but not TOR, this is likely set to 4.
Is your proxy TOR? TOR provides anonymous Socks proxy service. If this is TOR, make sure to tick the box, so QS knows.
Proper TOR configuration in QS
Authentication
If your proxy requires authentication, you'll need to provide the necessary info.
User ID
Enter the User ID of the account you're authenticating.
Password
Enter the account password.