Cold outreach operates with no prior consent and therefore no goodwill. Every technical and behavioral signal, including re-engagement campaigns, is weighted more heavily by mailbox providers.
What re-engagement campaigns are#
A re-engagement campaign targets inactive subscribers with a deliberate attempt to win them back; a sunset policy defines when to stop sending to those who do not respond.
Why it matters#
Continuing to mail unengaged contacts teaches providers your mail is unwanted. Sunsetting protects the rest of the list.
Applying re-engagement campaigns to outbound#
- Define inactivity: no clicks or replies in 90 days is a common threshold.
- Send a 2 to 3 message win-back series with a clear ask to stay subscribed.
- Suppress anyone who does not engage after the series.
- Keep a record of suppressed contacts for compliance and future opt-in.
Outbound-specific guardrails#
- Send from secondary domains, never the primary company domain.
- Cap each mailbox at 30 to 50 sends per day.
- Stop sequences on any reply, including informal opt-outs.
- Track reply rate as your primary quality metric.
Common mistakes#
- Never sunsetting because list size is a vanity metric.
- Using 'We miss you' subject lines that read as spam.
Frequently asked questions#
Will sunsetting hurt my revenue?
Rarely. Inactive contacts produce little revenue, and improved placement for engaged contacts usually offsets any loss.