B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
0.1%
0.1% -- email spam rate for outreach emails (2026)
A spam rate increasing beyond 0.1% can cause emails to start landing in spam.
- Represents a threshold above which emails start landing in spam rather than an empirical average.
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
TrulyInbox
Primary
Tier B
https://www.trulyinbox.com/blog/emails-going-to-spam/ ↗
Source Article
Why Are Your Emails Going to Spam + How You Can Fix It (2026)
Your offer is strong, and you know you are reaching the right audience.
Still, no replies!
I have been in this situation enough times to know what that usually means.
Your emails are either slipping into spam or not getting delivered at all!
When I first started running outreach, I kept tweaking sub…
Original Research
TrulyInbox
· Original study ↗
Methodology
Spam rate increasing beyond 0.1% can cause emails to go to spam.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
outreach emails: 0.1% email spam rate. Source: TrulyInbox (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/emails-to-spam-fix-2026-spam-rate
HTML Embed
<blockquote cite="https://lighthousedata.io/data/emails-to-spam-fix-2026-spam-rate" 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 rate for outreach emails<br><small>Source: TrulyInbox (2026) · <a href="https://lighthousedata.io/data/emails-to-spam-fix-2026-spam-rate" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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