How Many Cold Emails You Should Send Per Day Without Getting Blacklisted

Cold emailing remains one of the most effective ways to reach B2B prospects, but sending too many too fast can hurt your domain, trigger spam filters, or get your account suspended. That’s why understanding how many cold emails you can safely send per day is crucial for long-term success. Especially when using tools like Google Workspace, there are hard limits you need to respect — but beyond that, there are best practices that help you maintain high deliverability, good sender reputation, and better response rates.

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Understanding Email Sending Limits

Google Workspace sets strict sending limits to prevent spam and abuse. For standard accounts, the daily limit is around 2,000 emails, but this number is not safe for cold outreach, especially when contacting new recipients.

For cold emails, 30–50 emails per day per user is a much safer threshold. This keeps you under the radar of spam filters and reduces the risk of account suspension.

Each Google Workspace domain can support multiple users. If your domain allows for 3 users, and each sends 30 cold emails per day, you can safely manage up to 90 cold emails daily from a single domain — provided you follow deliverability best practices.

It’s also important to note:

• New accounts should start slower, sending fewer than 20 cold emails per day, and gradually warm up.
• Email sending limits reset every 24 hours, not necessarily at midnight — it’s based on a rolling 24-hour window.

Sending cold emails is not just about how many — it’s about how consistently and safely you send them.

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How Many Cold Emails You Should Send Per Day Safely

The safe number of cold emails you can send daily depends on how new your email account is, how warmed up it is, and how well your domain is set up.

If you’re starting with a new Google Workspace user, begin with 10–15 emails per day and gradually increase by 5 emails every few days. A full warm-up period can take 2–4 weeks, depending on how aggressive you plan to scale.

Once warmed up, the ideal safe volume is 30 cold emails per day per user. Pushing beyond that increases the risk of getting flagged by spam filters, especially if you’re targeting recipients with no prior interaction.

Scaling cold email volume safely includes:

• Avoiding large volume jumps
• Keeping bounce rates below 5%
• Maintaining consistent sending behavior (no sudden pauses or spikes)

Also, remember: high-quality, targeted cold emails have better engagement, which signals to inbox providers that your emails are valuable — letting you maintain higher sending volumes safely.

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Domain Setup: Maximizing Output Without Risk

To increase your cold email volume without triggering spam filters or hurting your sender reputation, you can scale horizontally — by using multiple email users under the same domain.

For example, if your domain allows 3 users, and each is safely sending 30 emails per day, that gives you a total of 90 cold emails per day. But to make this work without compromising your domain’s health, keep these points in mind:

• Use separate inboxes for each sender. Don’t rely on aliases or forwarding — each user should send directly.
• Personalize each inbox. Give each sender a real name, photo, and proper signature to make messages look authentic.
• Monitor performance across all users. If one inbox starts hitting high bounce or spam rates, it can affect the entire domain’s reputation.

Additionally, if you plan to scale further, consider setting up multiple domains (with different branding or sub-brands) and using separate Google Workspace accounts. Just ensure each domain is properly warmed up and configured.

Scaling smart means growing your output without sacrificing deliverability — or your sender reputation.

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Cold Email Best Practices to Stay Out of Spam

Staying out of spam folders is critical in cold emailing. Even if you’re sending within safe limits, poor technical setup or content can damage your deliverability. Here’s how to avoid that:

1. Set Up SPF, DKIM, and DMARC
These DNS records authenticate your emails. Without them, email providers may treat your messages as suspicious.

• SPF confirms your domain is allowed to send from your IP.
• DKIM signs your messages with encryption to prove legitimacy.
• DMARC tells providers how to handle unauthenticated emails.

2. Avoid Spammy Language
Phrases like “Buy now,” “Click here,” or too many exclamation marks can trigger spam filters. Keep your copy professional, concise, and personalized.

3. Use Throttling and Scheduling
Don’t blast 30 emails all at once. Spread them out during the day using automation tools that mimic human sending patterns.

4. Clean Your List Regularly
Bounce rates over 5% can damage your sender score. Always verify emails before sending and remove unresponsive or invalid addresses.

5. Track Engagement Metrics
High open and reply rates signal to inbox providers that your messages are wanted. Low engagement over time can flag your emails as unwanted.

Cold emailing isn’t just a numbers game — deliverability and engagement are what make those numbers count.

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Conclusion

Sending cold emails at scale requires more than just staying under platform limits — it’s about protecting your sender reputation, maintaining deliverability, and building trust over time. For Google Workspace users doing B2B outreach, the safe sweet spot is around 30 cold emails per day per user, with a max of 3 users per domain if you want to send up to 90 emails daily.

By warming up new inboxes gradually, configuring proper domain settings, and following cold email best practices, you can confidently grow your outreach without getting blacklisted. Play the long game — because sustainable sending equals better results.