B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
0.1%
0.1% -- spam complaint rate threshold for Email senders (per Google sender guidelines) (2026)
According to Google sender guidelines, senders should maintain a spam complaint rate below 0.10%.
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
Google
Primary
Tier B
https://www.aurorasendcloud.com/zh-cn/blog/email-fbl-deliverability ↗
Source Article
Email FBL Guide: Feedback Loops for Better Deliverability
Original Research
Google
· Original study ↗
Methodology
Guideline threshold cited from Google's sender guidelines / Postmaster help documentation; article states senders should maintain spam complaint rate below 0.10%
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Email senders (per Google sender guidelines): 0.1% spam complaint rate threshold. Source: Google (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/google-sender-spam-complaint-rate-010-threshold
HTML Embed
<blockquote cite="https://lighthousedata.io/data/google-sender-spam-complaint-rate-010-threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.1%</strong> -- spam complaint rate threshold for Email senders (per Google sender guidelines)<br><small>Source: Google (2026) · <a href="https://lighthousedata.io/data/google-sender-spam-complaint-rate-010-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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