Mail data should be sent to the body as an array. Data Transfer Example:
$response = wp_remote_post( $url, array(
'method' => 'POST',
'timeout' => 45,
'redirection' => 5,
'httpversion' => '1.0',
'blocking' => true,
'headers' => array(),
'body' => array( 'username' => 'bob', 'password' => '1234xyz' ),
'cookies' => array()
)
);
if ( is_wp_error( $response ) ) {
$error_message = $response->get_error_message();
echo "Something went wrong: $error_message";
} else {
echo 'Response:<pre>';
print_r( $response );
echo '</pre>';
}
$response ['body'] , .