B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
23%
23% -- email list decay rate for verified email addresses (2025)
ZeroBounce found that email list decay eased to 23% annually in 2025, down from 28% in 2024.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
23%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
ZeroBounce
Primary
Tier B
https://www.datamagnet.co/post/how-often-to-reverify-contact-data-cadence-guide/ ↗
Source Article
How Often Should You Re-Verify Contact Data? A Cadence Guide (2026)
Disclosure: This article is published by Datamagnet. Vendor claims are self-reported unless otherwise noted.
How Often Should You Re-Verify Contact Data? A Cadence Guide
Most teams check contact data once, load it into the CRM, and never look at it again. That's a problem: B2B contact records decay …
Original Research
ZeroBounce
· Original study ↗
Methodology
ZeroBounce Email List Decay Report based on more than 11 billion verified email addresses
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
verified email addresses: 23% email list decay rate. Source: ZeroBounce (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-decay-zerobounce-2025
HTML Embed
<blockquote cite="https://lighthousedata.io/data/email-decay-zerobounce-2025" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>23%</strong> -- email list decay rate for verified email addresses<br><small>Source: ZeroBounce (2025) · <a href="https://lighthousedata.io/data/email-decay-zerobounce-2025" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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