ChoiceMail is your digital doorman for all your email. It monitors all your incoming messages and any senders unknown to you are held up and the sender is asked to fill in a short form explaining why he or she wants to contact you. If senders do not register after a set period, their messages are quietly deleted. You are notified of new mail, as soon as the sender confirmed the message, and have the option to add him/her to your approval mail permanently, so that the validation process has not be repeated the next time. ChoiceMail runs as a local POP server, and no mail is ever lost. If you want, you can browse the pending or rejected email messages at any time, they are safely stored on your local computer until they are either deleted by you or confirmed.
The program acts as a "waiting area" between your email program and the internet. It downloads all your email, just like you would normally do, but only the ones that were approved by you are passed on to your email program (Outlook, Outlook Express, Eudora, Netscape etc). ChoiceMail can be customized in many aspects, you can pre-approve all your current contacts (imported from your address book) and setup rules to automatically approve messages based on domain, subject, keywords and more. You can also setup filters to automatically delete obvious spam and pre-approve anyone that you are sending an email to, eliminating the need for them get confirmed. Additional features include spam statistics, customized response messages, multiple accounts and more. ChoiceMail works with your existing email address and accounts.
ChoiceMail is a spam-blocking system based on the premise that all incoming email is assumed to be spam until senders have obtained permission (called registering) to send you email. Until they do so, mail from unapproved senders will not appear in your email application. Unapproved senders are automatically offered the opportunity to register. If they do so you are notified so that you can choose to approve (or not) all future emails from that sender. You can also easily preapprove your existing contacts. The registration process requires manual intervention by the sender, thereby eliminating all automatic spamming systems. When our system tray icon flashes, youve got legitimate mail.

The license of this software is Free Trial Software, the price is $39.95, you can free download and get a free trial.