Vikash Nehra 
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
Manual lead generation is slow, repetitive, and easy to get wrong. You copy contacts from a form into a spreadsheet, look each company up by hand, guess which leads matter, and forget to follow up. n8n lead generation fixes all of that: the open-source automation tool captures leads the moment they appear, enriches them with … Read more
The browser wars are back, but this time the fight is not about speed or tab groups — it is about artificial intelligence. In this comet vs chrome comparison, we pit Perplexity’s Comet, the first browser built around an AI agent, against Google Chrome, the world’s most popular browser, now supercharged with Gemini. Both promise … Read more
Cold email still works, but generic templates get deleted in seconds. Learning how to write cold emails with ChatGPT changes the math: you can research prospects, draft hyper-personalized openers, and build entire sequences in a fraction of the time, without sounding like a robot. This 2026 guide to chatgpt cold emails walks through the exact … Read more
Your subject line decides whether an email gets opened or ignored, and writing dozens of fresh ones every week is exhausting. An AI subject line generator solves that: you describe your email, and it produces dozens of optimized subject lines in seconds, tuned for curiosity, urgency, or personalization. In this 2026 roundup we tested the … 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