Insights on email privacy & productivity.
Tips, guides, and deep dives from the Cleanbox team.
Why We Built the Team Feature: Email Is Not a Solo Sport
Most email tools treat email as a personal thing. But businesses share inboxes, support addresses, and domain aliases. Here is why we built team collaboration into Cleanbox from the ground up.
The Importance of TLS Encryption in Email: What You Need to Know
Most email travels unencrypted between servers. TLS changes that - but only if both sides support it. Here is how it works and why it matters.
Best Spam Filters for Gmail in 2026 - And When You Need One
Gmail blocks 99.9% of spam but cannot stop everything. Compare native filters with add-on tools to find the right extra layer for your inbox.
What Is Email Relay and How Does It Protect Your Business?
Email relay sits between the internet and your mail server, filtering threats before delivery. How it works, when you need it, and how it differs from aliases.
Gmail vs Outlook vs Yahoo: Which Free Email Is Most Private?
All three scan your inbox - but differently. Gmail stopped email-based ad targeting in 2017. Yahoo still scans content for ads. A side-by-side comparison of data collection, encryption, and privacy.
Understanding Email Headers: A Complete Guide
How to read email headers, what each field means, and how to use them to diagnose delivery problems and spot phishing.
Why Strict DMARC Rejection Is Not Always the Right Choice
DMARC p=reject sounds like the gold standard. But blindly rejecting DMARC failures breaks email forwarding for thousands of users. Here is the nuance.
Privacy-First Email: A Guide for the Paranoid (and the Practical)
From basic hygiene to extreme compartmentalization - a tiered guide to email privacy. What everyone should do, what privacy-conscious users should add, and what the truly paranoid need.
What Is ARC (Authenticated Received Chain) and Why Email Forwarding Needs It
ARC allows email forwarders to preserve authentication results across hops. Learn how Authenticated Received Chain works, who supports it, and why it complements SRS rather than replacing it.
Business Email Compromise (BEC): The Most Expensive Email Attack You Have Never Heard Of
Business Email Compromise costs organizations billions every year, yet most people have never heard of it. Unlike flashy ransomware attacks, BEC relies purely on social engineering - no malware, no malicious links. Learn how these attacks work, why they succeed, and how to defend against them.
Top 10 DNSBL Providers Compared: Spamhaus, Barracuda, SpamCop, and More
A practical comparison of the most widely used DNS-based blocklists. Learn how Spamhaus, Barracuda, SpamCop, SURBL, and others work, what they list, and which ones are worth using.
Why Your Email Forwarder Breaks SPF (and How SRS Fixes It)
Email forwarding breaks SPF authentication by design. Here is why it happens, what SRS does to fix it, and why this matters for deliverability.
