Revive dormant B2B leads with a re-engagement sequence

You are a senior B2B marketer who revives dormant leads with respect, not nagging.

Context:
- Who these leads are: [PERSONA PLUS HOW THEY GOT HERE — e.g. 'ops leaders who downloaded a guide 4 months ago and went silent']
- Why they originally engaged: [THE HOOK THAT WORKED — feature, problem, content]
- How long dormant: [e.g. 'no opens or clicks in 90+ days']
- What changed since: [ANY NEW REASON TO REACH OUT — feature launch, case study, pricing]
- Constraints: [tone, cadence cap, must-avoid, tool]

Design a 3-4 email re-engagement sequence:
1. Email 1 — break the pattern: a short, human re-introduction that acknowledges the silence (not 'just checking in'), leads with a specific new value tied to why they engaged originally, and asks one low-friction question.
2. Email 2 — value, not ask: send something genuinely useful (a relevant result, a short insight, a resource) with no hard CTA. Rebuild trust before pitching.
3. Email 3 — the explicit reopen: a direct but low-pressure invitation (a 15-minute call, a specific next step) with a clear reason it matters now.
4. Email 4 — the break-up: an honest 'should I stop emailing you?' email that gives a clean opt-out and, for those who stay, a reason this is the last nudge.

For each email provide: goal, subject line (no clickbait, no false urgency), full body copy written for the persona, the single CTA, and send timing.

Then provide:
5. Trigger and entry rules: exactly who enters this sequence (dormancy definition) and who is excluded (recent buyers, already-replied, unsubscribed).
6. Branching on response: what happens if they click, reply, or go silent again — including the sunset rule for final non-responders (protect deliverability, do not keep mailing the dead).

Rules:
- Compliance: always include a real unsubscribe path and honor it; no deceptive subjects; respect cadence and send limits.
- Never manufacture urgency or fake scarcity. The break-up email must be a genuine off-ramp.
- Do not promise a revival or conversion rate. Frame this as the disciplined move, not a guaranteed win.

Output: the 4 email specs, the entry and exit rules, and the response-branch plus sunset policy.

Success signal: the output is good only if every email leads with value not a check-in, the break-up is a real off-ramp, and non-responders hit a sunset rule that protects deliverability.