Hello,
What do you think about challenge / response anti-spam systems? I am talking about services such as SpamArrest that send verification links back to the senders of e-mail. There are several pros and cons of such systems. For example, it may work well for the user of the service to help keep spam out of their inbox since a link click is required to have the e-mail delivered, but one of the major cons is that spammers rarely use a valid From: address so that link can end up going to an innocent person (you get spammed!) or they use the address of a commonly whitelisted e-mail address received by the masses. What are your opinions on this topic?
What do you think about challenge / response anti-spam systems? I am talking about services such as SpamArrest that send verification links back to the senders of e-mail. There are several pros and cons of such systems. For example, it may work well for the user of the service to help keep spam out of their inbox since a link click is required to have the e-mail delivered, but one of the major cons is that spammers rarely use a valid From: address so that link can end up going to an innocent person (you get spammed!) or they use the address of a commonly whitelisted e-mail address received by the masses. What are your opinions on this topic?