Insights on email privacy & productivity.
Tips, guides, and deep dives from the Cleanbox team.
Email Security Threats in 2026: A Comprehensive Overview
From AI-powered phishing and business email compromise to SIM swapping and zero-day exploits - a deep dive into every major email threat vector and how to defend against each one.
Email Reputation Systems Explained: How IP and Domain Reputation Determine Delivery
Your email deliverability depends heavily on the reputation of your sending IP and domain. Learn how reputation is built, lost, and monitored using tools like Google Postmaster Tools, Microsoft SNDS, and Sender Score.
How to Clean Up and Organize Your Email Inbox
Clean up your inbox in one weekend and keep it organized permanently. A four-phase system from triage to maintenance - with defenses that prevent future clutter.
The Problem with Bayesian Spam Filtering: Why Pattern Matching Is Not Enough
Bayesian spam filters have protected our inboxes for 20 years. They are brilliant at pattern recognition. But they do not understand what an email actually says - and that gap is where modern phishing thrives.
The Anatomy of a Phishing Email: How to Spot Fakes in 2026
AI has made phishing emails nearly perfect. We dissect real-world examples and teach you the technical signals that still give them away.
How to Set Up a Custom Domain Mailbox
A complete guide to setting up email on your own custom domain. From registering a domain to configuring DNS records, choosing between full hosting and alias forwarding, and testing authentication - everything you need for a working custom domain mailbox.
How to Set Up a Professional Email Address in Under 10 Minutes
A no-nonsense guide to getting you@yourbusiness.com working in 10 minutes flat. No enterprise tools, no overkill.
Email Accessibility: Making Your Messages Readable for Everyone
One in five people has a disability. Your emails should work for all of them. Practical guidelines for accessible email - alt text, semantic HTML, plain text, color contrast, and screen reader compatibility.
Everything You Need to Know About Using Subdomains for Email
info.brand.com, news.brand.com, mail.brand.com - subdomains are everywhere in email. When are they legitimate, when are they phishing, and should you use them for your own domain?
Registration and Password Reset Bombardment: How to Stop It
Attackers flood your inbox with hundreds of signup confirmations and password reset emails. Why it happens and how aliases and rate limiting stop it.
The Complete Guide to Deleting Old Online Accounts
That forum you signed up for in 2014. The shopping site you used once. The fitness app you tried for a week. Every dormant account holds your personal data and is a breach waiting to happen. Here is how to find them, delete them, and handle the ones that refuse to go away.
Monitoring Your Domain's Email Health with the Cleanbox API
Build a daily monitoring script that tracks spam rates, delivery failures, quarantine backlog, and usage trends - then sends a summary to Slack. Python implementation with working API calls.
