B
Evidence Grade B
Graded
under review
Safe to Cite
Recent
21%
21% -- spam placement rate for legitimate marketing emails (2025)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
21%
Unit
Percentage
Data Vintage
2025
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
ReturnPath
Primary
Tier C
https://bettermerge.com/blog/the-ultimate-guide-to-mail-merge-for-gmail/ ↗
Source Article
The Ultimate Guide to Mail Merge for Gmail - BetterMerge blog
Sending personalized emails to a large group? It’s tedious and time-consuming. That’s where mail merge comes in—helping you automate the process while keeping the personal touch intact. In this ultimate guide, we’ll cover everything about using mail merge with Gmail. Whether it’s newsletters, invite…
Original Research
ReturnPath
· Original study ↗
Methodology
Cited from ReturnPath via BetterMerge blog
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
legitimate marketing emails: 21% spam placement rate. Source: ReturnPath (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/spam-placement-rate-21
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<blockquote cite="https://lighthousedata.io/data/spam-placement-rate-21" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>21%</strong> -- spam placement rate for legitimate marketing emails<br><small>Source: ReturnPath (2025) · <a href="https://lighthousedata.io/data/spam-placement-rate-21" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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