Via the admin page added by the plugin, Comments -> Commenter Emails, admin users are presented with the following information:

• A total count of all unique commenters to the site
• The entire list of each unique commenters' email addresses, names, and provided website URLs
• A button to download the entire list of unique commenters' email addresses (and, optionally, their website URL) in CSV (comma-separated values) format

The plugin only considers approved comments and does not exclude from its listing any known email addresses (i.e. admin and post author email addresses).

Links: Plugin Homepage | Plugin Directory Page | GitHub | Author Homepage

2.6.1 (2020-07-05)

Highlights:

• This minor release improves markup output formatting, adds a TODO.md file, updates a few URLs to be HTTPS, expands unit testing, and notes compatibility through WP 5.4+.

Details:

• New: Add TODO.md and move existing TODO list from top of main plugin file into it (and add to it)
• Change: Add newlines in output after block-level elements
• Change: Make an overlooked string translatable
• Change: Note compatibility through WP 5.4+
• Change: Update links to coffee2code.com to be HTTPS
• Change: Tweak code formatting
• Unit tests:
  • New: Add tests for admin_menu(), register_admin_menu()
  • Change: Use HTTPS for link to WP SVN repository in bin script for configuring unit tests
  • Change: Remove unnecessary unregistering of hooks in tearDown()
  • Change: Add more spacing around "Tests" section separator

2.6 (2020-01-01)

Highlights:

• This minor release notes compatibility through WP 5.3+, refactors some of the code, expands unit testing, and updates the copyright date (2020).

Details:

• Change: Extract filename handling out from admin_menu and into new get_filename()
• Change: Extract logic to determine if CSV button should be shown out from admin_menu and into new should_show_csv_button()
• Change: Extract logic to determine if email addresses should be listed on the admin page out from admin_menu and into new should_show_email_addresses()
• New: Add get_plugin_basename() to retrieve the plugin's basename
• Unit tests:
  • New: Add test to verify plugin hooks plugins_loaded action to initialize itself
  • New: Add tests for filters: c2c_commenter_emails_filename, c2c_commenter_emails_show_csv_button, c2c_commenter_emails_show_emails
  • New: Add tests for functions: enqueue_admin_css(), plugin_action_links()
  • New: Add approach for capturing hook values
  • Delete: Remove unnecessary test_admin_stuff() and its use in other tests
  • Delete: Remove duplicated test
• Change: Use sprintf() in places as a clearer way to construct strings rather than building them via concatenation
• Change: Note compatibility through WP 5.3+
• Change: Tweak whitespace in code and inline code docs
• Change: Update copyright date (2020)

2.5.1 (2019-06-25)

• Change: Update unit test install script and bootstrap to use latest WP unit test repo
• Change: Note compatibility through WP 5.2+

Full changelog is available in CHANGELOG.md.

1. Install via the built-in WordPress plugin installer. Or download and unzip commenter-emails.zip inside the plugins directory for your site (typically wp-content/plugins/)
2. Activate the plugin through the 'Plugins' admin menu in WordPress
3. View the commenter email information reported in the WordPress admin via Comments -> Commenter Emails

A screenshot of the admin page created by the plugin to view commenter emails.



A screenshot of the plugin's settings page with the "Help" tab expanded to reveal input for limited the listing of commenters to those who commented on specified posts.