B Evidence Grade B Graded accuracy verified by the review judge Safe to Cite Dated

49.7%

49.7% -- spam share of email volume for global email (2018)

Name: Spam Share Of Email Volume Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-25

2018 · blog.comodo.com

49.7% of the 269 billion emails sent daily are spam.

Secondary citation citing an unnamed report

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Attribution: blog.comodo.com View source

Lighthouse Research Team

Last verified: 2026-09-25 · How we verify data →

Source verified Evidence graded

Value

49.7%

Unit

Percentage

Data Vintage

2018

Entity

global email

Geography

Global

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

blog.comodo.com Primary Tier C

https://blog.comodo.com/email-security/what-is-email-spam-checker/ ↗

Confidence: 48/100 Vintage: 2018 Channel: Deep Crawl

Source Article

Email Spam Checker | Get Free Spam Protection For Business Emails

Email spam is a matter of grave concern to any organization as it can hinder the growth, profitability and IT security. Mostly, spam emails slow-down the productivity of employees by forcing them to clear the unwanted emails. Besides that, the spam emails bring the network performance to a grinding …

Original Research

blog.comodo.com · Original study ↗

Methodology

Cited by Comodo blog from an unnamed report; secondary source

Methodology documented

Segmentation

Industrymarketing RegionGlobal RoleAll marketers Channelemail

Cite this stat

Plain Text

global email: 49.7% spam share of email volume. Source: blog.comodo.com (2018). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-spam-share-49-7-percent

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<blockquote cite="https://lighthousedata.io/data/email-spam-share-49-7-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>49.7%</strong> -- spam share of email volume for global email<br><small>Source: blog.comodo.com (2018) · <a href="https://lighthousedata.io/data/email-spam-share-49-7-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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