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Filtering

Rule engine

The rule engine controls filtering more finely than threshold and lists – Proxmox-style, built from rules and reusable object groups. Found under Settings → Rules.

Rule engine: reusable object groups (Who/What/When) and rules processed by priority with action and direction.

Object groups

Groups bundle criteria of one category:

  • Who – sender/recipient (address, domain)
  • What – content traits (e.g. subject, attachments)
  • When – time windows

Rules

A rule links groups to an action (accept, block, quarantine, tag) and a direction (in/out). Rules run by priority; Stop ends further processing. Tip: create object groups first, then build rules on top.