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Nonprofit· National nonprofit
Harbor Foundation
Protected appeal deliverability across a decaying donor list.
Higher
inbox placement on appeals
−90%
hard bounces at year-end
1 upload
before the big campaign
The challenge
Harbor's donor list had quietly degraded over years of giving cycles, and year-end appeals were landing in spam.
Every bounced appeal was a missed donation.
What they did
- 1Verified the full donor database before the year-end campaign and removed long-dead addresses.
- 2Segmented risky catch-all addresses out of the main appeal to protect sender reputation.
“Our appeals reach inboxes now. For a nonprofit, that deliverability is real money.”
Illustrative scenario with representative numbers.
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