B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
18%
18% -- email delivery failure rate for Sinch Mailgun analyzed emails (2025)
Nearly 18% of emails sent in 2025 did not reach the inbox according to Sinch Mailgun's analysis of over 400 billion emails.
- Source states 'nearly' or 'almost' 18% (Nesten 18 %)
- Refers to emails that did not reach the inbox (which includes spam folder placement as well as delivery failures)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
18%
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
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Sinch Mailgun
Primary
Tier A
https://no.qrcodechimp.com/60-email-marketing-stats-2022/ ↗
Source Article
30+ Email Marketing Statistics You Must Know | QRCodeChimp
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Men måten e-postytelse måles på har endret seg. Apple Mail Privacy Protection har gjo…
Original Research
Sinch Mailgun
· Original study ↗
Methodology
Analysis of 400+ billion emails sent
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Sinch Mailgun analyzed emails: 18% email delivery failure rate. Source: Sinch Mailgun (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/emails-not-reaching-inbox-2025
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<blockquote cite="https://lighthousedata.io/data/emails-not-reaching-inbox-2025" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>18%</strong> -- email delivery failure rate for Sinch Mailgun analyzed emails<br><small>Source: Sinch Mailgun (2025) · <a href="https://lighthousedata.io/data/emails-not-reaching-inbox-2025" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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