Insights on email privacy & productivity.
Tips, guides, and deep dives from the Cleanbox team.
How We Built AI-Powered Spam Detection That Understands What Emails Actually Say
Traditional spam filters count words. Ours reads the email, understands context, spots brand impersonation, and explains its reasoning in plain English. Here is how we built it and what it catches that Bayesian filters miss.
Email Security for Freelancers: Protect Your Professional Reputation
A practical email setup for freelancers - custom domain, alias per client, spam protection, and professional appearance on a budget.
DMARC Alignment Explained: Why Authentication Alone Is Not Enough
Passing SPF and DKIM is not enough for DMARC. Learn what identifier alignment means, the difference between relaxed and strict modes, and why forwarding breaks SPF alignment but preserves DKIM alignment.
How to Audit Your Email Infrastructure for Security Weaknesses
Your MX records are public. Your SMTP banner reveals your software. Your TLS config may be outdated. Here is a step-by-step security audit of your email infrastructure using free tools - and how to fix what you find.
How to Block Spam Emails on iPhone and iPad
A complete guide to blocking spam emails on iOS. Learn how to block senders, report junk, filter unknown senders, use mail rules, and understand why server-side filtering matters more than anything you can do on the device itself.
Why We Built Custom Spam Symbols: Filling the Gap Between Score and Context
Rspamd is excellent at scoring email. But it does not know which senders your community trusts or distrusts. Our custom CLEANBOX_* symbols bridge that gap with crowd-sourced intelligence.
Cold Email Is Spam: Why Unsolicited Outreach Hurts Everyone
That personalized sales pitch in your inbox? Still spam. Why cold email damages the email ecosystem, how warmup services make it worse, and how to protect yourself.
How to Stop Promotional Emails Without Unsubscribing from Everything
You do not want to block every marketing email - just the noise. Here is how to keep the ones you want, silence the rest, and never see another subject line with "FLASH SALE" again.
How to Stop Getting Emails Without Unsubscribing
Sometimes clicking unsubscribe is not the right move. Here are alternative ways to stop unwanted email using filters, contact states, and aliases.
What Is Two-Factor Authentication and Why You Need It
Passwords alone are not enough to protect your accounts. Two-factor authentication adds a critical second layer of security - but not all 2FA methods are created equal. Learn how TOTP apps, hardware keys, and backup codes work, and why your email security is the foundation of it all.
Someone Signed Up for Services Using My Email Address - What to Do
Getting emails for accounts you never created? Here is why strangers use your email to sign up, how to stop it, and how to protect yourself.
Email for Side Projects: From Free to Professional in 10 Minutes
Your side project needs a professional email address. Here is the cheapest way to set it up - from domain purchase to receiving your first email.
