to simulate ISP handshakes, checking DNS records and simulating SMTP connections without ever actually sending a message. It was precise, surgical, and expensive.
High bounce rates can land your IP address on global blacklists.
Many SaaS platforms offer a "pay-as-you-go" model, which is much more affordable for small businesses than a full software license. Summary 🛡️
There are free, open-source email verification scripts available on platforms like GitHub that are transparent and safe to use.