How Many Cold Emails Can You Send Per Day? (2026 Limits)

By Saksham JainPublished on: Mar 31, 2026 · 7 min read · Last reviewed: Mar 2026

InboxKit mailboxes showing 858 active mailboxes across Google and Microsoft — InboxKit manages 858 active mailboxes across Google Workspace and Microsoft 365, distributing volume safely across accounts.

TL;DR

Google Workspace allows 2,000 emails/day. Microsoft 365 allows 10,000. But new accounts start much lower, and exceeding limits triggers suspensions. Here are the exact numbers from Google and Microsoft's documentation.

Official Sending Limits

These are the documented limits from Google and Microsoft. Not estimates. official numbers from their support documentation.

Limit	Google Workspace	Microsoft 365	Source
Daily sending limit	2,000 emails	10,000 emails	support.google.com/a/answer/166852 / learn.microsoft.com
Per-minute rate	~20 emails/min	~30 emails/min	Observed, not documented
Recipients per message	2,000	500	Official docs
New account (first 24h)	150-500 emails	500-1,000	Observed
New account (first week)	500-1,000	2,000-5,000	Observed
After warmup (30+ days)	2,000	10,000	Official maximum

Source: Google Workspace Admin Help (support.google.com/a/answer/166852) and Microsoft 365 Exchange Online limits (learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits).

Critical caveat: These are maximum limits, not recommended sending volumes. Sending at maximum capacity on a new account will trigger suspensions. The safe range for cold email is 30-50 emails per mailbox per day after proper warmup.

Safe Sending Volumes for Cold Email

The official limits are theoretical maximums. For cold email, you need much lower volumes to maintain deliverability:

Warmup Stage	Day	Safe Volume/Mailbox	Risk at This Volume	Mailboxes for 1,000/day
Fresh (no warmup)	0	0	Suspension likely	Don't send
Week 1	1-7	5-10/day	Low	100-200
Week 2	8-14	15-25/day	Low	40-67
Week 3	15-21	25-40/day	Low-Medium	25-40
Warmed (30+ days)	30+	30-50/day	Low	20-34
Aggressive	30+	50-80/day	Medium	13-20
Maximum (risky)	30+	80-100/day	High	10-13

Mailboxes needed: 34 (1,000 ÷ 30)
Domains needed: 12 (3 mailboxes per domain)
Monthly cost on InboxKit: 34 × $2.99 = $101.66/mo (Google Workspace)

Mailboxes: 167
Domains: 56
Monthly cost: 167 × $2.99 = $499.33/mo

Source: These safe volumes are based on InboxKit's data across 10,000+ mailboxes and align with recommendations from Instantly, SmartLead, and Woodpecker documentation.

What Happens When You Exceed Limits

Google and Microsoft handle limit violations differently:

Violation	Google Workspace	Microsoft 365
Exceed daily limit	24-hour sending block	Sending restricted
Exceed per-minute rate	Temporary throttle	Rate limiting
High bounce rate (>5%)	Account suspension review	Account restriction
High spam complaints	Account suspension	Account restriction
Sending from new account	Progressive limit enforcement	Soft limits first week
Repeated violations	Account termination	Account termination

Google is stricter. Google suspensions can be permanent with no appeal for bulk sending violations. Microsoft tends to restrict first and terminate only for repeat offenders.

Source: Google Workspace Terms of Service Section 4 (workspace.google.com/terms) and Microsoft 365 Acceptable Use Policy.

InboxKit protection: We distribute sending across multiple isolated workspaces. Each domain has its own admin panel, preventing one account's issues from affecting others. The domains page shows NS status and mailbox counts per domain to help you manage distribution.

Scaling Strategy: Mailboxes × Volume = Total Sends

The formula for safe cold email scaling:

Total daily sends = Number of mailboxes × Safe volume per mailbox

Target Volume	Mailboxes (30/day)	Domains (3/domain)	Google Cost	Microsoft Cost	Mixed (70/30)
100/day	4	2	$11.96/mo	$11.96/mo	$11.96/mo
500/day	17	6	$50.83/mo	$50.83/mo	$50.83/mo
1,000/day	34	12	$101.66/mo	$101.66/mo	$101.66/mo
2,500/day	84	28	$251.16/mo	$251.16/mo	$251.16/mo
5,000/day	167	56	$499.33/mo	$499.33/mo	$499.33/mo
10,000/day	334	112	$998.66/mo	$998.66/mo	$998.66/mo

Mixed cost calculation: 70% Google ($2.99) + 30% Microsoft ($2.99) = weighted average $2.99/mailbox.

Why mix Google and Microsoft? Provider diversity improves deliverability. If your prospects use Gmail, sending from Google Workspace has slightly better inbox placement (same-provider trust). Same logic applies to Microsoft. A 70/30 mix covers both.

Source: InboxKit pricing (inboxkit.com). Google Workspace $2.99/mo, Microsoft 365 $2.99/mo. No platform fee, no minimum.

Frequently Asked Questions

2,000 emails per day per account (source: support.google.com/a/answer/166852). New accounts start lower at 150-500 and ramp up over 2-4 weeks.

Technically the limit is 10,000, but sending that volume from one account will trigger restrictions. Safe cold email volume is 30-50 per mailbox per day. Use 200-334 mailboxes for 10,000/day.

About 34 mailboxes at 30 emails/day each. On InboxKit Google Workspace, that costs $101.66/mo (34 × $2.99). You'd need approximately 12 domains (3 mailboxes per domain).

Google Workspace suspensions for bulk sending can be permanent. The account may be terminated with no appeal. This is why distributing volume across many mailboxes and using proper warmup is critical.

Both work well. Google has stricter enforcement but higher trust from Gmail recipients. Microsoft has higher limits but stricter initial throttling. Best practice: use both (70/30 mix) for provider diversity.