Why are email addresses not encoded?

First of all, make sure the plugin is activated.

To check if email addresses are encoded, you need to look at the plain HTML source code of the page, because browser development tools will display decimal/hexadecimal entities as plain text.

If you have email addresses hard-coded in theme or plugin files, you’ll need encode them manually using the eae_encode_emails() or eae_encode_str() function. See FAQ.

If email addresses that you entered through the WordPress admin interface aren’t encoded, the theme or plugin does not use the standard WordPress functions to display content. In this case, please ask the support team of your theme or plugin to either implement the standard function like the_content() to display content, or if the theme/plugin provides any custom filters to manipulate parts of the output.