B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
0.1%
0.1% -- email spam complaint rate threshold for Email sender reputation (industry threshold) (2026)
The spam complaint rate must be kept below 0.1%, beyond which sender reputation enters hostile territory.
- Industry standard / best practice threshold to maintain good deliverability and sender reputation
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
0.1%
Unit
Percentage
Data Vintage
2026
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
lucaattolini.com
Primary
Tier B
https://www.lucaattolini.com/email-marketing-report/ ↗
Source Article
Email Marketing Report: i 7 numeri fondamentali - Luca Attolini
Un email marketing report è il documento che trasforma i dati grezzi del tuo canale email in decisioni di fatturato. Non è un elenco di percentuali da archiviare, ma la mappa che ti dice dove stai vincendo, dove stai perdendo denaro e quale prossima mossa spostare risorse. Un email marketing report …
Original Research
lucaattolini.com
· Original study ↗
Methodology
Industry-recommended maximum spam complaint rate before sender reputation is damaged
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Email sender reputation (industry threshold): 0.1% email spam complaint rate threshold. Source: lucaattolini.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/klaviyo-2026-spam-complaint-threshold-0-1-percent
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<blockquote cite="https://lighthousedata.io/data/klaviyo-2026-spam-complaint-threshold-0-1-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.1%</strong> -- email spam complaint rate threshold for Email sender reputation (industry threshold)<br><small>Source: lucaattolini.com (2026) · <a href="https://lighthousedata.io/data/klaviyo-2026-spam-complaint-threshold-0-1-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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