The link was changed to get Immunity Debugger, so I had to update this.

You can get Immunity Debugger here Immunity Debugger Install Link

The Mona Extensions are located here Mona Extensions for Immunity Debugger

The proof of concept for SLMail 5.5's Exploit is located here SLMail 5.5 Buffer Overflow Vulnerability Proof of Concept

The vulnerable app for SLMail 5.5 is located here Download SLMail 5.5 Installer