B
Evidence Grade B
Graded
under review
Safe to Cite
Current
70%
70% -- emails with spam issues rate for Emails (deliverability scan) (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
70%
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
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Litmus
Primary
Tier C
https://www.aurorasendcloud.com/zh-hk/blog/what-is-an-email-service-provider ↗
Source Article
什麼是電子郵件服務供應商
Original Research
Litmus
· Original study ↗
Methodology
Attributed to Litmus deliverability experts; share of emails with at least one spam-related issue affecting inbox placement. No date given.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Emails (deliverability scan): 70% emails with spam issues rate. Source: Litmus (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/emails-with-spam-issues-litmus
HTML Embed
<blockquote cite="https://lighthousedata.io/data/emails-with-spam-issues-litmus" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>70%</strong> -- emails with spam issues rate for Emails (deliverability scan)<br><small>Source: Litmus (2026) · <a href="https://lighthousedata.io/data/emails-with-spam-issues-litmus" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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