B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
6.4%
6.4% -- missing email rate for global email senders (2025)
Globally across tested email providers, an average of 6.4% of sent emails are missing entirely.
- Based on tested mailbox providers
- Includes both legitimate and promotional email
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
6.4%
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
arphost.com
Primary
Tier B
https://arphost.com/email-deliverability-best-practices/ ↗
Source Article
Email Deliverability Best Practices: Guide for IT Pros
Your application sends a password reset. The user clicks twice, waits, checks spam, and opens a support ticket. Finance sends an invoice notice, but the message lands in junk and payment stalls. Ops rotates an alert address, and the new server starts mailing from a hostname with broken DNS. None of …
Original Research
arphost.com
· Original study ↗
Methodology
Share of email missing entirely across tested providers
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
global email senders: 6.4% missing email rate. Source: arphost.com (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/global-missing-email-rate-6-4
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<blockquote cite="https://lighthousedata.io/data/global-missing-email-rate-6-4" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>6.4%</strong> -- missing email rate for global email senders<br><small>Source: arphost.com (2025) · <a href="https://lighthousedata.io/data/global-missing-email-rate-6-4" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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