Proxy server  
Use proxy server  
When checked forces the use of a proxy server when viewing HTML pages. The options below can only be accessed when this option is checked.  
Get proxy server settings from MS Internet Explorer  
When checked this option will cause the proxy server settings to be taken from your MS Internet Explorer settings. This option is not available if 'Use proxy server' is not set.  

Proxy server IP address .  

Proxy server port address. For MS proxy usually 8080, Winroute, WinProxy use 3128, another common value is 80.  

User name / Password  
Values required to access to proxy server if necessary.  

Choose email client you will use in PSPad editor. Independent of default client in system.