| Sumario: | The article responds to the comments by David Jameson related to the article "Spam, Spim, and Spit," published in the April 2005 issue of the periodical "Communications of the ACM," concerning the disadvantages of challenge/ response (C/R) email systems. The best test of the idea will be to observe its uptake in the community of users and the interest shown by email client and server software developers in incorporating it into their systems. It is believed that some users will find it so annoying they'll stop using it, particularly if it involves repeated confirmation requests, perhaps from everyone on a distribution list. The other problem is that "From" addresses are easily spoofed, so a whitelist created with confirmed sources might still allow the Spam to get through.
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