B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
15%
15% -- email engagement rate lift for time-zone-based sending schedules (2025)
Setting up dedicated sending schedules based on recipient time zones improved email engagement rates by 15-20% across monitored campaigns.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
15%
Unit
Percentage
Data Vintage
2025
Entity
Sample Size
45,000
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
Labnify
Primary
Tier B
https://labnify.com/blog/lessons-from-monitoring-45000-emails-where-dedicated-smtp-reduced-spam-comp… ↗
Source Article
Lessons from monitoring 45000 emails where dedicated SMTP reduced spam
Your emails are disappearing into spam folders, and you’re losing potential customers every single day. After monitoring over 45,000 emails across multiple campaigns, I discovered something that completely changed how I think about email delivery – and the results were staggering.
When we switched t…
Original Research
Labnify
· Original study ↗
Methodology
Range 15-20%; midpoint used. Vendor-monitored email campaigns
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
time-zone-based sending schedules: 15% email engagement rate lift. Source: Labnify (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/timezone-sending-engagement-lift-15-20
HTML Embed
<blockquote cite="https://lighthousedata.io/data/timezone-sending-engagement-lift-15-20" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>15%</strong> -- email engagement rate lift for time-zone-based sending schedules<br><small>Source: Labnify (2025) · <a href="https://lighthousedata.io/data/timezone-sending-engagement-lift-15-20" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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