B
Evidence Grade B
Graded
under review
Safe to Cite
Current
0.01%
0.01% -- spam trap rate threshold for email list hygiene (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
0.01%
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
95
Source Trust
50
Citation Chain
20
Independence
30
Methodology
45
Freshness
86
Source
Microsoft
Primary
Tier A
https://bird.com/nl/resources/blog/6-rules-maximum-outlook-deliverability ↗
Source Article
6 Rules For Maximum Outlook Deliverability
Key Takeaways
- Outlook deliverability depends heavily on IP reputation, authentication, and consistent sending practices.
- Warming up new IPs is crucial; Microsoft limits new senders to 10,000 emails per day until trust is established.
- Feedback loops (FBLs) should be monitored closely—high compl…
Original Research
Microsoft
· Original study ↗
Methodology
Guidelines for avoiding spam traps
Methodology documented
Segmentation
Channelcommon_crawl
Cite this stat
Plain Text
email list hygiene: 0.01% spam trap rate threshold. Source: Microsoft (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/spam-trap-rate-threshold
HTML Embed
<blockquote cite="https://lighthousedata.io/data/spam-trap-rate-threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.01%</strong> -- spam trap rate threshold for email list hygiene<br><small>Source: Microsoft (2026) · <a href="https://lighthousedata.io/data/spam-trap-rate-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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