Email Outreach Engine.

Cold email at scale gets you blocked.

A cold outreach campaign has two failure modes: not finding the right emails, and getting your sender reputation torched by blasting them too fast. Most off-the-shelf tools fail on the first. The rest fail on the second.

The engine was built to cover both ends — a collector with sensible heuristics, and a sender disciplined enough to keep deliverability above 90%.

Scrape, queue, dispatch — with rate caps that respect the inbox.

A Playwright collector harvests emails from Facebook Groups and Instagram hashtags into a queue. A webmail sender pulls from the queue at a deliberate cap of 50 per day with randomised timing, so reputation stays healthy.

Every step has a kill switch. If deliverability drops, the sender auto-throttles. If the collector hits a rate limit, it backs off without losing state.

Non-obvious decisions.

• Sending reputation — rate cap was tuned against warm-up curves. 50/day is the sweet spot for a new sender domain.
• Two-source strategy — mixing FB Groups and IG hashtags diversifies the source pool; either alone is too fragile.
• State resumability — the queue persists; a process crash does not lose an in-flight batch.

Why this one matters.

Cold acquisition is brutal unless the infrastructure is disciplined. This pipeline is disciplined. It lets a solo operator run outbound at a volume that keeps inbox reputation intact — which is what makes it useful past week one.