« The Joys of Remote Computer Access Using VNC | Main | TCO of Software is Not Generally Reflected in License Cost »

Fear Spreading that Challenge-Response Email Filtering May Wreak Havoc

Recently, large internet service providers have been working on challenge-response systems that ask the sender of an email message to answer some sort of question or interact with a web application before email will be delivered to a protected email address. Many journalists expect that a huge number of disparate systems, all performing the same basic task, will be deployed in the near future.

On CNET News.com, Declan McCollough predicts that challenge-response systems will wreak havoc on list servers and other legitimate forms of communication. According to the article:

Challenge-response systems, ironically, share some characteristics with spam: In small quantities, both are only mildly annoying to the recipient. But as quantities increase, they make it more difficult to use e-mail at all. MailFrontier.net is a good example: It prevents its users from signing up to mailing lists unless the list operator manually intervenes to answer the challenge, a process that is exactly backward.

We agree. As soon as we can, CTDATA will notify subscribers to our websites' headline services that we will unsubscribe anyone whose mailbox automatically challenges email from our sites.

Our users opted into receiving these emails, and it makes no sense for challenge-response systems to invalidate all of the decisions that email users previously made on well designed and well behaved Internet communications systems.

Post a comment

(If you haven't left a comment here before, you may need to be approved by the site owner before your comment will appear. Until then, it won't appear on the entry. Thanks for waiting.)


CTDATA Venutures (CTDATA) develops Internet and Intranet applications for corporations and non profit organizations. Our services include:

  • Consulting services for Movable Type and TypePad-based publishing systems (visit our Weblog Improvement website for more information),
  • Financial services business process consulting,
  • Content management system and knowledge management system consulting,
  • Apache web server engineering and hosting,
  • MySQL, Sybase, and Microsoft SQL Server architecture and development,
  • SOAP, REST, and XML-RPC system architecture and programming, including Amazon Web Services and
  • Weblog publishing.
For more information, contact Dave Aiello by email at dave [at] daveaiello.com or call him at +1-267-352-4420.
Copyright © 1995-2010, CTDATA Ventures. All Rights Reserved.
Powered by
Movable Type 4.25