Creating your first filter rule
How to build a filter with conditions and actions.
Filters
Filters
Building filter rules to sort, block, or redirect email based on sender, content, or spam symbols.
Advanced filtering: combining conditions and groups
Using ANY/ALL logic, regex, and AI categories for complex rules.
Testing and reordering your filters
Test filters against existing messages and manage filter priority.
Using filters with relay addresses
How filter rules work on relay-protected addresses and what limitations apply.
Using filter samples and templates
Cleanbox provides pre-built filter templates for common use cases. How to use them, customize them, and when to start from scratch.
Spam symbol reference guide
A complete list of spam symbols you can use in filter rules - what each symbol means and when it triggers.
Filter components and match types reference
A complete reference of all 10 filter condition components and 12 match operators available in Cleanbox filter rules.
Spam symbols available in filters
The most useful Rspamd spam symbols you can use in Cleanbox filter rules - what each one means and when to filter on it.
Filter samples: 8 practical use cases for everyday email
Eight real-world filter examples from the Cleanbox sample library - organizing receipts, blocking scams, muting newsletters, and more.
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