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Obfuscate field formatter

Obfuscates email addresses as a Field Formatter of the core Email field.

Provides a simple and flexible way to prevent spam by using the core default Email field.
For some reasons, you should prefer to leave the field formatter of some view modes to Plain text or Email.
All the view modes (default / full, teaser, search index, ...) that exposes publicly email addresses should define the fields to Obfuscate.

Credits to Alexei Tenitski for the obfuscation solution on the first release.

Related modules

SpamSpan filter

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