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.
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.