In 2026, inbox providers no longer treat email authentication as optional. Gmail, Yahoo, and Microsoft all require proper authentication for bulk senders, and missing or broken records are one of the fastest ways to land in spam — or get rejected outright. This email authentication checklist covers every record, setting, and monitoring habit you need … Read more
A Postfix server left on default settings is a magnet for spammers. Within hours of going online, bots will probe it for open relays, hammer it with authentication attempts, and try to use it to blast spam — which can get your IP blocklisted and your domain’s reputation destroyed. Learning how to secure postfix properly … Read more
Postal is a modern, open-source mail server built for sending and receiving email at scale, and running it in containers makes installation far simpler than a traditional setup. This postal docker guide walks you through installing Postal on Docker, configuring DNS, creating your first mail server and domain, and sending your first test email — … Read more
Exposing a self-hosted app to the internet usually means port forwarding, dynamic DNS, and hoping your ISP does not block inbound ports. A Cloudflare Tunnel does it better: it creates a secure outbound connection from your server to Cloudflare’s network, so your apps become reachable on a public domain without opening a single inbound port … Read more
Choosing between Dokku vs Coolify is one of the most common dilemmas for developers who want Heroku-like deployments on their own server. Both are open-source, self-hosted Platform-as-a-Service tools that turn a cheap VPS into a deployment machine, but they take very different approaches. Dokku is a minimalist, command-line-driven “tiny Heroku,” while Coolify is a full … Read more
If you want Heroku-style deployments on your own server without the monthly bill, this guide will show you how to install Coolify on a VPS in under 30 minutes. Coolify is a free, open-source, self-hostable platform that turns any virtual private server into your own Platform-as-a-Service: push your code, and Coolify builds, deploys, and secures … Read more
If you are shopping for a cheap VPS to run your own mail server, you have probably seen Ultahost in budget hosting roundups. But is it actually a good fit for bulk email sending? This ultahost review digs into pricing, performance, and the one question that matters most for email marketers: is port 25 open? … Read more
If you send bulk email from your own server, your VPS provider matters as much as your software. You need an open port 25, a clean dedicated IP, and the freedom to configure reverse DNS. In this Hostwinds review, we look at the US hosting company through the eyes of an email marketer: pricing, VPS … Read more
If Gmail is where your emails land — or where they quietly die in the spam folder — you need visibility into how Google actually sees your sending. Setting up Google Postmaster Tools gives you exactly that: a free dashboard from Google showing your domain and IP reputation, spam complaint rates, delivery errors, and authentication … Read more
If you send bulk email, an email feedback loop is one of the most important sender-reputation tools you can set up. Simply put, an email feedback loop (FBL) is a service offered by mailbox providers that forwards a copy of a spam complaint back to the sender whenever a recipient clicks “Report spam” or “This … Read more