app.post("/api/send", async (req, res) => { const request = mailjet.post("send", { version: "v3.1" }).request({ Messages: [ { From: { Email: "ifallinmeat@gmail.com", Name: "Default" }, To: [ { Email: req.body.email, Name: req.body.name } ], Subject: `Your pucharse of product ${req.body.product_name} was correctly`, TextPart: `Dear ${req.body.name} your pucharse was correctly bought`, HTMLPart: "<p>Thanks.</p>" } ] }); let response = await request; res.send({ status: response.Messages[0].Status ? "success" : "error" }); });