B
Evidence Grade B
Graded
under review
Safe to Cite
Current
85%
85% -- share of global email that is spam for global email traffic (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
85%
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
Cisco IronPort
Primary
Tier B
http://www.theemailguide.com/email-marketing/b-to-b-online-what-3-email-marketing-mistakes-make-you-… ↗
Source Article
B to B Online – What 3 email marketing mistakes make you look like a spammer?
Original Research
Cisco IronPort
· Original study ↗
Methodology
Cited from Cisco IronPort; collection date used as vintage
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
global email traffic: 85% share of global email that is spam. Source: Cisco IronPort (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/spam-share-global-email-cisco
HTML Embed
<blockquote cite="https://lighthousedata.io/data/spam-share-global-email-cisco" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>85%</strong> -- share of global email that is spam for global email traffic<br><small>Source: Cisco IronPort (2026) · <a href="https://lighthousedata.io/data/spam-share-global-email-cisco" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
Share
Use this data in your work
Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.