- Email & DNS
- Backend
Have you ever thought how email works?
One click on Send, six hops, five DNS records and a handshake in plain text.
You press Send and a second later it lands on the other side of the world. Here is the whole journey: SMTP, the servers it passes through, and the DNS records (MX, SPF, DKIM, DMARC) that decide whether it reaches the inbox or the spam folder.