Prevent Contact Form 7 (CF7) From Sending Email

Put it in your theme’s functions.php and update the form id (999999) to your CF7’s form ID.

// skip sending cf7 email
add_filter( 'wpcf7_skip_mail', 'mycustom_wpcf7_skip_mail', 10, 2 );
function mycustom_wpcf7_skip_mail( $skip_mail, $contact_form ) {
	if ( 999999 == $contact_form->id() ) { $skip_mail = true;	}
	return $skip_mail;
}