获取API使获取请求而不是发布

我在后端使用ReactJS和nodeJS。

我正在以这种方式处理表单提交：

const [email, setEmail] = useState({
    name: "",
    subject: "",
    message: "",
    address: "",
  });
const sendHandler = async e => {
    e.preventDefault();
    setSending(true);
    const res = await fetch("/api/send-mail", {
      method: "post",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify(email),
    });
    ...rest of the code
  };

But somehow, when sendHandler function is executed, get request is made instead of post. P.S i'm making request from localhost to https website.