B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
0.3%
0.3% -- spam complaint rate risk threshold for Gmail (2025)
Under Google's Gmail sender guidelines, spam complaint rates approaching 0.30% put senders at serious risk of widespread filtering.
- Rates approaching 0.30% put senders at serious risk of widespread filtering
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
0.3%
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Google
Primary
Tier B
https://www.strategymavenagency.com/blog/why-are-my-emails-going-to-spam ↗
Source Article
Why Are My Emails Going to Spam? Understanding Email Deliverability and How to Fix It
Why Are My Emails Going to Spam? Understanding Email Deliverability and How to Fix It
Your email went out. The design was clean, the offer was solid, the copy was tight. And it still didn't move the needle.
Before you question the subject line or the send time, check the basics: it may never have re…
Original Research
Google
· Original study ↗
Methodology
Platform sender guidelines, cited by agency blog
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Gmail: 0.3% spam complaint rate risk threshold. Source: Google (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/gmail-spam-complaint-serious-risk-0-30
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<blockquote cite="https://lighthousedata.io/data/gmail-spam-complaint-serious-risk-0-30" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.3%</strong> -- spam complaint rate risk threshold for Gmail<br><small>Source: Google (2025) · <a href="https://lighthousedata.io/data/gmail-spam-complaint-serious-risk-0-30" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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