Invisimail

Invisimail provides a content filter to hide email addresses from spam-bots. Email addresses are converted to ascii code and optionally written to the page using a concatenated JavaScript "write" command. The email addresses will appear on the page normally, but their html source will be obscured so as not to appear as an email address to email harvesting robots. Invisimail also provides an option to automatically create mailto links for email addresses.

Obviously, the best protection is not to publish email addresses at all. But on a community site, some users are going to do this regardless. Invisimail provides protection for these email addresses.

Note that you may need to set the invisimail filter to apply before or after the HTML Filter, depending on the settings you select for each.

New in Drupal 6: Invisimail can now be used as a formatter for the email CCK field module!

Notes on versions

- The Drupal 5 version is no longer being maintained. It will be de-listed once Drupal 7 is released.

- The Drupal 6 version is in maintenance mode. There will be no more work on it aside from critical bug fixes. This module requires PHP 5.2.

- The Drupal 7 version is pending. The filter API actually changed in Drupal 7 for the first time in half a decade, so I will be taking the opportunity to try and make the code more flexible and extensible. Stay tuned. Additional feature requests will be considered once the refactoring is completed. Those with patches provided will get considerably more attention. :-)

Originally written by Jeff Robbins with Lullabot.