email marketing

Free SMTP sounds impossible — sending mail costs money somewhere — but the gap between "free tier" and "actually usable" hides three solid paths: provider free tiers with daily limits, community relays, and running your own MTA on a box you already own. Which ones deliver, which burn your domain...

Spam is a reputation engine wearing a junk-mail costume. The message never changed much — the machine around it did. This guide opens the whole mail operation: SMTP conversations, the four gates between you and an inbox, warmup schedules and authentication, all broken down so clean a kid could...