Verify domains have valid mail servers before sending campaigns.
Sending emails to domains without valid MX records wastes resources and hurts sender reputation.
Check MX records before adding domains to email lists to ensure deliverability.
const res = await fetch("https://api.apiverve.com/v1/mxlookup?domain=yahoo.com", {
headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);