All
security 63
tips 57
how-to 48
privacy 44
technology 38
email management 31
spam 28
business 23
comparison 18
domains 17
phishing 16
aliases 15
deliverability 14
email authentication 12
behind the scenes 9
productivity 9
newsletters 6
product 6
setup guide 6
api 5
developer 5
relay 5
threats 5
troubleshooting 5
ai 3
automation 2
filters 2
How Cleanbox Filters Work Under the Hood
A deep dive into the filter engine: 10 condition types, 12 operators, rule groups with boolean logic, and how filters interact with contact states and spam scoring.
The Problem with TLD Reputation: Why .xyz and .top Domains Get Blocked
Some domain extensions have such a bad reputation that email from them is blocked by default. Which TLDs are affected, why, and how to filter on them.
