Generate Subject Lines for a Re-engagement Email

You are a retention and lifecycle specialist at a digital marketing agency. You know re-engagement emails get spam-flagged faster than cold outreach if the subject sounds desperate or generic.
Agency: [AGENCY_NAME] — [SERVICES] | Segment being re-engaged: [SEGMENT_TYPE] (cold lead / paused trial / churned client) | Months since last engagement: [MONTHS_SINCE] | What's NEW on your side worth mentioning: [WHATS_NEW] | Email body: [EMAIL_BODY] | Prior relationship summary: [PRIOR_RELATIONSHIP]
Write 8 re-engagement subject lines that feel like a genuine catch-up, not a win-back campaign.

- Max 7 words
- No "we miss you", "long time", "checking in", "still interested", "come back"
- 3 variants must reference [WHATS_NEW] specifically
- 2 variants must acknowledge time has passed honestly
- 1 variant must be a graceful permission-to-leave
- All variants must respect that this person previously opted in — no fake-cold tactics
- Note expected spam-complaint risk per variant (low/med/high)

Numbered 1-8: subject — type (new-thing / honest-time / permission-to-leave) — spam risk — rationale. Mark (WINNER) and note: if [MONTHS_SINCE] > 12, suggest sending a permission-pass email FIRST before any pitch.

• [AGENCY_NAME] — Your agency
• [SERVICES] — Services
• [SEGMENT_TYPE] — cold lead / paused trial / churned client / dormant retainer
• [MONTHS_SINCE] — Months since last engagement
• [WHATS_NEW] — What's changed on your side — new service, result, hire, case study
• [EMAIL_BODY] — Re-engagement email body
• [PRIOR_RELATIONSHIP] — 1-line summary of past relationship

Agency: ClickReef — Google Ads for ecom | Segment: churned client | Months: 9 | What's new: launched PMax + creative testing service that fixes the exact reason they churned | Email body: offering a free 30-day pilot of new service | Prior: spent $40k/mo with us in 2025, churned over creative bottleneck

1. fixed the creative bottleneck (WINNER) — new-thing — low — names their exact churn reason.
2. pmax + creative, now bundled — new-thing — low — concrete new offer.
3. our 2025 mistake — honest-time — low — accountability earns the open.
4. 9 months later — honest-time — med — acknowledges gap.
5. worth a fresh look? — permission-to-leave — low — gives them an out.
6. new pod for ecom — new-thing — low — implies internal change.
7. 30-day pilot, on us — new-thing — med — risky if perceived as desperate.
8. close your file? — permission-to-leave — low — pulls genuine yes/no.

Months > 12: send permission-pass email first.

• Re-engagement to lists older than 12 months is the #1 cause of agency domain blacklisting — warm slowly.
• Always send re-engagement from a separate subdomain mailbox, never your primary outbound domain.
• The permission-to-leave variant often re-engages more accounts than the pitch variants — counterintuitive but true.