We'll create fresh WordPress site with Contact Form 7 SendInBlue Opt-in Checkbox installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Just use Contact Form 7’s normal shortcodes like so:
‘[email* your-email]’
‘[checkbox sendinblue-opt-in default:1 “Subscribe” ]’
‘[hidden sendinblue-list-id “13”]’
That’s all there is to it.