How to clean an email list and remove invalid addresses before sending

Every bounced email costs you a little sender reputation, and a list exported from a form, a CRM or an old spreadsheet is full of addresses that will bounce: typos like gmial.com or .con, domains that no longer exist, throwaway inboxes and shared info@ addresses. You want to find those before you press send, not after. This guide shows how to check a whole list in one run with a small Apify Actor published by Hay Equipos called Email Validator: Syntax, MX, Disposable and Role Check. It works from public DNS only. It never sends an email and never connects to anyone's mail server.