validating contact list

[news.micrsoft.com]

I once sent an email to someone that had an add on or some service for
validating incoming emails. The first time you contact the recipient, the
service autoresponded with a message asking you to validate and type the
characters seen on the screen. The recipient also had the ability to check
the address of the incoming mail and accept or reject the email once the
sender jumped over the first barrier requiring the confirmation of the real
email. Can anyone tell me how to add this functionality? I would like to use
such a system for making email more private.

 

[Sue Mosher [MVP-Outlook]]

This is a feature of certain mail servers, such as http://www.boxbe.com. While it is effective for the person seeking the protection, it is also sufficiently annoying to many recipients that they will just ignore the validation request.