B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Aging
2%
2% -- bounce rate reputation threshold for Gmail (2024)
Gmail's Postmaster Tools shows domain reputation degrading when bounce rates consistently exceed 2-3%.
- Applies when bounce rates consistently exceed the 2-3% threshold
Attribution:
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Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
2%
Unit
Percentage
Data Vintage
2024
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
Google
Primary
Tier B
https://bouncezero.io/blog/email-verification-roi ↗
Source Article
Is Email Verification Worth the Cost? Yes - Here's the 2026 ROI Data
Yes - for most senders, email verification is worth the cost. At $3 per 1,000 addresses, verifying a 100K list costs $300. A single campaign with a 5% bounce rate can drop inbox placement by 30-50% for all subsequent campaigns - thousands of dollars in lost revenue during the 60-90 day recovery wind…
Original Research
Google
· Original study ↗
Methodology
Midpoint of 2-3% range; reference to Google 2024 bulk sender requirements via Postmaster Tools
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Gmail: 2% bounce rate reputation threshold. Source: Google (2024). Via Lighthouse Intelligence -- https://lighthousedata.io/data/gmail-bounce-rate-reputation-threshold
HTML Embed
<blockquote cite="https://lighthousedata.io/data/gmail-bounce-rate-reputation-threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>2%</strong> -- bounce rate reputation threshold for Gmail<br><small>Source: Google (2024) · <a href="https://lighthousedata.io/data/gmail-bounce-rate-reputation-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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