Failure mode: re-pitching the same domain repeatedly

Failure mode: re-pitching the same domain repeatedly
Mistake: separate campaigns hit the same domain three times in a month with different broken links. The editor flags you as spam; the whole domain goes cold.
Fix dedup-and-throttle workflow:
— 1. Maintain one master contact ledger across all campaigns.
— 2. Before any send, check the domain against last-contacted date.
— 3. Enforce a minimum cool-down: no second pitch to a domain within 30 days.
— 4. If multiple dead links exist for one domain, consolidate into a single pitch.
— 5. QA gate: send is blocked if the domain was contacted inside the cool-down window.
Automation: a shared dedup table queried at send time across every campaign.
Definition of done: no domain receives more than one pitch per 30-day window, dead links consolidated.