B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Aging
0.3%
0.3% -- spam complaint rate threshold for Gmail sender domains (bulk/cold email senders) (2024)
Under Gmail's 2024 sender policy update, deliverability is lowered when spam complaint rate exceeds 0.3%.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
0.3%
Unit
Percentage
Data Vintage
2024
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
Google (Gmail Sender Guidelines)
Primary
Tier C
https://www.relate.kr/blog/cold-email-deliverability/ ↗
Source Article
콜드메일 회신이 없는 진짜 이유 — 보낸 메일이 스팸함에 들어갔을 수 있습니다.
콜드메일 회신이 없는 진짜 이유 — 보낸 메일이 스팸함에 들어갔을 수 있습니다.
왜 콜드메일 회신이 없을까? 3편으로 끝내는 아웃리치 가이드 | 1편
회신이 없는 건 카피 문제가 아닐 수 있습니다
콜드 메일 답장률이 높지 않아 Spread를찾아주시는 고객들께서 공통적으로 겪으시는 과정이 있습니다.
"제목이 별로였나?", "본문이 너무 길어서 사람들이 안 읽나?", "CTA가 약했나?"
고민하며 제목을 바꾸고, 카피를 고치고, 다시 보냅니다. 하지만 결과는 똑같습니다.이유는 간단합니다. 메일이 애초에 받은편지함에 도착하지 않았기 때문…
Original Research
Google (Gmail Sender Guidelines)
· Original study ↗
Methodology
Gmail 2024 sender policy update: domain deliverability is lowered once spam complaint rate exceeds 0.3%; cited in the article via Mailgun, State of Email Deliverability 2025
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Gmail sender domains (bulk/cold email senders): 0.3% spam complaint rate threshold. Source: Google (Gmail Sender Guidelines) (2024). Via Lighthouse Intelligence -- https://lighthousedata.io/data/gmail-spam-complaint-rate-threshold
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<blockquote cite="https://lighthousedata.io/data/gmail-spam-complaint-rate-threshold" 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 threshold for Gmail sender domains (bulk/cold email senders)<br><small>Source: Google (Gmail Sender Guidelines) (2024) · <a href="https://lighthousedata.io/data/gmail-spam-complaint-rate-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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