Last week I checked the email security of eight automation agencies and seven of them could be spoofed. The check itself is two DNS lookups and takes about thirty seconds, which raises an obvious question: if it's that cheap, why does almost nobody run it? Because it's thirty seconds you have t...
Source: [Dev.to](https://dev.to/kacper_35e1f61a8f41c3886b/i-turned-a-30-second-security-check-into-an-app-you-can-connect-to-claude-or-chatgpt-3c4f)