AskFirst

Stop POP3 SPAM quickly and with little effort! AskFirst is essentially a Challenge and Response system for the Windows Operating system, using any POP3 / SMTP compliant email account. AskFirst is a sidecar application that lives in the system tray. Using AskFirst, you can turn as many POP3 InBoxes as you wish, into "Permission Based InBox's" in seconds. AskFirst also enables a Passcode System to over ride the protection of the Challenge and Response system, meaning you can provide your web traffic with a way to send you email, without having to validate their identity. You may create (and destroy) as many passcodes as you need at the click of a button. If you spend more than half an hour a day at your InBox, then you NEED to take a stance.
And protecting your InBox from those who hide behind false addresses may do more than simply clean your spam. It also eliminates the potential of getting virus ridden file attachments from strangers:: Quite a concern these days.
AskFirst provides a way to take back full control over your InBox, and who may (and may NOT) contact you. AskFirst provides a sure fire way to block spam without error. Either an email address is ON your list, or is is NOT. It doesn't get any easier or more simple.