source: https://www.securityfocus.com/bid/30606/info

WinGate is prone to a remote denial-of-service vulnerability affecting the application's IMAP email server.

Exploiting this issue will consume computer resources and deny access to legitimate users.

WinGate 6.2.2 is vulnerable; other versions may also be affected. 

The following example command is available:

LIST Ax1000 *