B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
0.5%
0.5% -- unsubscribe rate threshold for email marketing campaigns (2026)
The unsubscribe rate for mailing lists should stay below 0.5% per email.
- Occasional spikes after promotional campaigns are normal
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
0.5%
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
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
The Growth Spice
Primary
Tier A
https://thegrowthspice.com/email-marketing/what-is-a-mailing-list/ ↗
Source Article
What Is A Mailing List? How To Build & Grow One | The Growth Spice
What Is a Mailing List?
A Complete Guide to
Building and Growing One
A mailing list is a collection of email addresses gathered from people who have voluntarily opted in to receive messages from a business, brand, or individual. These addresses are grouped together so that one message can be sent to…
Original Research
The Growth Spice
· Original study ↗
Methodology
Occasional spikes after promotional campaigns are normal, but a persistent upward trend signals a mismatch between content and subscriber expectations.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
email marketing campaigns: 0.5% unsubscribe rate threshold. Source: The Growth Spice (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email_unsubscribe_rate_threshold
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<blockquote cite="https://lighthousedata.io/data/email_unsubscribe_rate_threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>0.5%</strong> -- unsubscribe rate threshold for email marketing campaigns<br><small>Source: The Growth Spice (2026) · <a href="https://lighthousedata.io/data/email_unsubscribe_rate_threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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