B
Evidence Grade B
Graded
under review
Safe to Cite
Current
0.5%
0.5% -- spam complaint rate threshold for major email campaign accounts (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
0.5%
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
artunlimitedusa.com
Primary
Tier C
https://www.artunlimitedusa.com/blog/marketing-tips/complete-strategy-with-email-marketing ↗
Source Article
Why No Strategy is Complete without Email Marketing
Original Research
artunlimitedusa.com
· Original study ↗
Methodology
One unnamed study; secondary citation
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
major email campaign accounts: 0.5% spam complaint rate threshold. Source: artunlimitedusa.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/spam-complaint-account-lockout-threshold
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<blockquote cite="https://lighthousedata.io/data/spam-complaint-account-lockout-threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.5%</strong> -- spam complaint rate threshold for major email campaign accounts<br><small>Source: artunlimitedusa.com (2026) · <a href="https://lighthousedata.io/data/spam-complaint-account-lockout-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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