B
Evidence Grade B
Graded
under review
Safe to Cite
Current
70%
70% -- marketing emails share of spam for Email spam messages (marketing emails) (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
70%
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
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Return Path
Primary
Tier C
https://afilioteka.pl/category/marketing-i-reklama/email-marketing/ ↗
Source Article
Email Marketing Archives
Original Research
Return Path
· Original study ↗
Methodology
Secondary citation of Return Path research; no study date, sample size, or methodology stated in source
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Email spam messages (marketing emails): 70% marketing emails share of spam. Source: Return Path (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/marketing-emails-share-of-spam
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<blockquote cite="https://lighthousedata.io/data/marketing-emails-share-of-spam" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>70%</strong> -- marketing emails share of spam for Email spam messages (marketing emails)<br><small>Source: Return Path (2026) · <a href="https://lighthousedata.io/data/marketing-emails-share-of-spam" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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