The author discusses various techniques for obfuscating email addresses to protect against spam. These techniques include clickable links with URL encoding or HTML entities, as well as plain text with display none, HTML comments, or symbol substitution. The author highlights surprising findings, such as the fact that an unprotected email address actually blocked a spam email and that certain techniques can still be broken by bots that don’t interpret JavaScript. The author also mentions potential controversies, such as the usability issues that can arise from certain obfuscation techniques. Overall, the article provides a comprehensive overview of different email obfuscation methods and their effectiveness.
https://spencermortensen.com/articles/email-obfuscation/