hbmail.exe is a mass-mailing worm W32.Mytob.FW@mm. hbmail.exe opens a back door on TCP port 6667. hbmail.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\hbmail.exe Adds the value: "WINDOWS SYSTEM DNSPOOL" = "hbmail.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill hbmail.exe process and remove hbmail.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.