# How many cold emails can I send per day without hurting my domain?

Canonical: https://growfast.sh/solutions/how-many-cold-emails-per-day | Last updated: 2026-11-13 | Published by GrowFast

There is no universal number. Start a new domain at about 15 a day and raise it over weeks while bounces and complaints stay low; Google advises a consistent rate and warns against sudden spikes. GrowFast ramps a new domain from 15 a day to 200 over four weeks and caps an account at 500 a day.

## Why it happens

Mailbox providers track volume and feedback per sending domain and IP. A domain with no history that suddenly sends hundreds of messages looks like the pattern spammers use, so receivers rate-limit it or send it to spam. Reputation is earned by sending steady volumes that people do not complain about.

Volume also compounds with mistakes. Fifty emails to a bad list produce a handful of bounces you can fix. Five hundred produce enough that the domain is flagged before you notice.

## The fix that works without GrowFast

1. **Start at about 15 a day.** Write to the best-fit companies first, those most likely to reply, so early feedback is good.
2. **Send at the same time each day.** Google recommends a consistent rate and avoiding bursts, especially without a history of large volumes.
3. **Raise volume only while results are clean.** Google's advice if messages start bouncing or deferring is to reduce volume until errors fall, then increase slowly. Do not double overnight.
4. **Count follow-ups in the daily total.** A follow-up is an email like any other. A campaign of 15 first emails and 15 follow-ups is 30 a day.
5. **Watch Postmaster Tools and your bounce rate.** Check spam rate and domain reputation, and bounce rate by address type, every few days at first.
6. **Do not spread the same volume over fresh domains to dodge the ramp.** Each new domain starts with no reputation. Ten domains each at 15 a day is a pattern receivers also notice.
7. **Pause on any complaint spike.** Stop sending, find the cause, then resume lower.

**The ramp GrowFast enforces, from the sender's own limits (read from the code, 2026-11-13). A verified domain whose sending address starts with mail. is capped at 50 a day, like the managed address; the 200 ceiling applies to other verified domains.**

| Days since the domain's first email | Your own verified domain | Managed GrowFast address |
| --- | --- | --- |
| Days 0 to 2 | 15 a day | 15 a day |
| Days 3 to 6 | 30 a day | 30 a day |
| Days 7 to 13 | 50 a day | 50 a day |
| Days 14 to 27 | 100 a day | 50 a day |
| Day 28 onward | 200 a day | 50 a day |

## Do I need a warm-up tool?

Some tools exchange emails between members' mailboxes to build a sending history. GrowFast does not run such a network and we cannot tell you whether they work or what receivers make of them. What we do is enforce a gradual ramp, so new domains never send a full allowance on day one.

## When to use GrowFast

The ramp, the 500-a-day account ceiling, the monthly allowance and the automatic pause are enforced in the sender, so an agent cannot exceed them on cold outreach by asking. Follow-ups are not blocked by the ramp or ceiling, but they use up room that new emails would otherwise have. list_sending_domains returns the account's sending domains and the managed address with the sends remaining today, and get_email_allowance returns the monthly allowance.

**When it is not the right tool:** If you need thousands of cold emails a day, GrowFast's 500-a-day account ceiling is too low for you; a different sending setup is needed.

## Ask your AI assistant

Paste this into an assistant that has the GrowFast MCP server connected:

> Assign to GrowFast: show me my sending domains and how many sends each has left today (list_sending_domains) and my monthly allowance (get_email_allowance). Don't send anything. Show me the numbers so I can approve how many emails to queue today.

Tools used: `list_sending_domains`, `get_email_allowance`. These need the full server (https://growfast.sh/api/mcp) with an API key.

## FAQ

### Why 15 a day?

It is the starting rate GrowFast uses for every new sending domain. It is a conservative default, not a rule from a mailbox provider.

### Do replies lift my limit?

Not in GrowFast. The ramp counts days since the domain's first email, and the limits apply however results look, though poor results can pause the account.

### Does Google publish a cold email limit?

No. It publishes requirements for senders above 5,000 messages a day to Gmail and advice on increasing volume slowly.

### What about sending from several mailboxes?

Each mailbox on one domain shares that domain's reputation. GrowFast counts the ramp per domain, not per address.

## Sources

- [Google, Email sender guidelines (Gmail Help)](https://support.google.com/mail/answer/81126) (read 2026-11-13)

## Related

- [Why do my cold emails land in spam, and how do I fix it?](https://growfast.sh/solutions/why-do-cold-emails-go-to-spam)
- [Should I send cold email from a separate domain, and how do I set one up?](https://growfast.sh/solutions/set-up-a-separate-domain-for-cold-email)
- [How do I check that SPF, DKIM and DMARC are set up before I send cold email?](https://growfast.sh/solutions/check-spf-dkim-dmarc-before-cold-email)
- [All problems and solutions](https://growfast.sh/solutions)