The Flamingo plugin by Takayuki Miyoshi does save all email addresses entered into CF7 forms. If you don't want or need that, you can disable this function by activating my plugin.
From WordPress Plugin Directory
- In your backend, go to Plugins → Add New to search for Disable Flamingo Addressbook in the WordPress Plugin Directory.
- Click Install Now and then Activate.
- You're done.
Manual Installation
- Download the plugin's ZIP file to your desktop and extract the archive.
- Upload the folder disable-flamingo-addressbook into the directory
/wp-content/plugins/
on your webserver.
- Activate Disable Flamingo Addressbook via the Plugins menu in your WordPress Dashboard.