B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
67%
67% -- spam placement likelihood increase for emails with 3+ promotional trigger phrases (2026)
Emails containing three or more promotional trigger phrases are 67% more likely to hit spam.
- Research source is not specifically named in the text
Attribution:
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Lighthouse Research Team
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Source verified
Evidence graded
Value
67%
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
automailer.io
Primary
Tier C
https://automailer.io/cold-email-deliverability-guide ↗
Source Article
The Complete Guide to Cold Email Deliverability in 2026 | AutoMailer
What Cold Email Deliverability Actually Means
Quick Answer
Cold email deliverability is the ability of your outbound emails to reach a recipient's primary inbox rather than landing in spam, promotions, or getting blocked entirely. It depends on three things working together: your technical infrastru…
Original Research
automailer.io
· Original study ↗
Methodology
Research cited without named source
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
emails with 3+ promotional trigger phrases: 67% spam placement likelihood increase. Source: automailer.io (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/promotional-phrases-spam-likelihood-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/promotional-phrases-spam-likelihood-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>67%</strong> -- spam placement likelihood increase for emails with 3+ promotional trigger phrases<br><small>Source: automailer.io (2026) · <a href="https://lighthousedata.io/data/promotional-phrases-spam-likelihood-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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