B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
20
20 -- cold emails per mailbox daily limit for Google Workspace and Microsoft 365 accounts (2026)
Google Workspace and Microsoft 365 accounts face scrutiny when exceeding roughly 20-50 cold emails per mailbox daily.
- Practical ceiling before attracting scrutiny
- Source states a range of 20 to 50 emails per mailbox per day
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
20
Unit
Count
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
bouncezero.io
Primary
Tier C
https://bouncezero.io/blog/instantly-ai-review-2026 ↗
Source Article
Instantly.ai Review 2026 - Honest Pros, Cons, and Who Should Use It
If you have spent any time in cold email communities over the last three years, you have seen the same recommendation repeated endlessly: "just use Instantly." The platform has grown from a scrappy inbox-rotation tool into one of the two dominant cold email platforms on the market, reportedly servin…
Original Research
bouncezero.io
· Original study ↗
Methodology
Range 20-50, midpoint used; based on email industry data and provider guidance
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Google Workspace and Microsoft 365 accounts: 20 cold emails per mailbox daily limit. Source: bouncezero.io (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/cold-email-daily-limit-per-mailbox-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/cold-email-daily-limit-per-mailbox-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>20</strong> -- cold emails per mailbox daily limit for Google Workspace and Microsoft 365 accounts<br><small>Source: bouncezero.io (2026) · <a href="https://lighthousedata.io/data/cold-email-daily-limit-per-mailbox-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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