With Custom Rules you can:
Define more precise policies: Combine 50+ message attributes with AND/OR logic and exclusions, including authentication results, domain age, subject patterns, and attachment types.
Test before enforcing: Validate rules against historical messages from the last 10-30 days, test in passive mode against real mail before enforcing, and keep unfinished rules in draft.
Control access: Use role-based permissions to manage who can view, create, and edit rules.
Gain greater visibility: Track rule changes, monitor match counts and see which rules acted on specific messages.
What to expect:
On November 11, existing Safelist and Blocklist entries will automatically migrate to Custom Rules in passive mode, and Safelist and Blocklist becomes delete-only. Your existing lists will continue to enforce during a seven-day review period. On November 18, migrated rules will become active and the legacy lists will be retired. No action is required to maintain your existing policies
