How many cold emails should I send per day?

Start with 5-10 per inbox per day for new accounts. After 2-3 weeks of warm-up, scale to 35-50 per inbox. If you need to send 500+ emails per day, use 10-15 warmed inboxes and rotate sends across all of them. Never push a single inbox beyond 50 cold emails per day.

What is a good cold email reply rate?

The average reply rate across all cold campaigns is 3.43%. A 'good' reply rate is 3-8%. Top performers consistently hit 8-15%. Rates above 15% are possible with excellent targeting and trigger-based personalization but are not typical at scale.

How long should a cold email be?

Keep cold emails between 50-125 words. Some studies suggest up to 150 words for certain B2B audiences. Shorter emails consistently outperform longer ones. If you need more than 125 words to make your point, your message is not focused enough.

Should I use HTML or plain text for cold emails?

Plain text. Always. HTML emails with logos, images, and formatted layouts trigger spam filters and look like marketing emails. A plain text email from one person to another is what cold email should look like. The only exception is your email signature, which can include basic formatting.

How many follow-ups should I send?

4-7 follow-ups is the sweet spot. 42% of replies come from follow-ups rather than the first email. Space them at Day 3, Day 7, Day 14, Day 21, and Day 30. Each follow-up should add new value, not just 'bump' the thread.

Cold Email Masterclass

Chapter 13 of 15

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Chapter 13

Cold Email Masterclass

Compliance and Legal Requirements

Ignoring email compliance laws is not a gray area. It is a fast track to fines, blacklists, and destroyed sender reputation.

Cold email is legal in most jurisdictions when done correctly. But the rules vary by country, and violating them carries real consequences.

CAN-SPAM Act (United States)

CAN-SPAM applies to any commercial email sent to recipients in the United States. Penalties: up to $51,744 per email in violation.

Requirements

Clear sender identification

Accurate subject lines (no deception)

Physical mailing address included

Opt-out mechanism that works and is easy to find

Honor opt-outs within 10 business days

What Most Get Wrong

CAN-SPAM does not require opt-in consent for B2B email. You can email someone cold. But you must identify yourself honestly, include your address, and offer a way to unsubscribe.

GDPR (European Union)

GDPR applies to any email sent to recipients in the EU, regardless of where you are located. Penalties: up to 20 million euros or 4% of global revenue.

For B2B Cold Email Under GDPR

You can use "legitimate interest" as your legal basis

Document your legitimate interest reasoning

Include a clear privacy policy link

Respect the right to be forgotten

Never use purchased lists without verified consent

Maintain data processing records

What Most Get Wrong

GDPR does not ban B2B cold email. It requires a lawful basis for processing personal data. Legitimate interest is an accepted basis for B2B prospecting. You must be able to explain why contacting this specific person serves a legitimate business purpose.

CASL (Canada)

CASL is one of the strictest email laws in the world. It applies to any commercial email sent to Canadian recipients. Penalties: up to $10 million per violation.

Requirements

Express or implied consent required before sending

Implied consent expires after 2 years

Clear sender identification

Functional unsubscribe mechanism

Record keeping of consent sources and dates

What Most Get Wrong

Under CASL, you have implied consent to email someone if they published their email address and your message is relevant to their published role. A B2B email to a business address published on a company website can qualify as implied consent. But document everything.

Compliance Best Practices

Practice

Status

Include physical mailing address

Required

Provide unsubscribe option

Required

Honor opt-outs within 10 days

Required

Maintain suppression lists

Required

Document consent sources

Required

Use purchased lists without verification

Violation

Send without identifying yourself

Violation

Ignore opt-out requests

Violation

Practical Compliance Setup

Add your physical business address to every email signature

Include a one-click unsubscribe link in every cold email

Maintain a master suppression list across all campaigns and tools

Process unsubscribe requests the same day they arrive

Document your legitimate interest basis for any EU prospects

Never email personal email addresses for cold B2B outreach. Always use business addresses

Never email anyone who has previously opted out

Most cold email platforms handle suppression lists and unsubscribe links automatically. Firstsales.io includes unsubscribe management, suppression list maintenance, and compliance tracking across all campaigns.

Key Takeaway

Compliance is not optional. The rules are clear, the penalties are real, and the tools to stay compliant are built into every legitimate platform. Follow the rules, document your process, and never cut corners on consent or opt-outs.

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Related Masterclass Chapters

Explore more chapters from the Cold Email Masterclass.

Chapter 1

Why Cold Email Still Works in 2026

8 min

Chapter 2

The Cold Email Mindset Shift

7 min

Chapter 3

Building Your Foundation

10 min

Chapter 4

Inbox Warm-Up Strategy

7 min

Chapter 5

List Building & Research

9 min

Chapter 6

Writing Cold Emails That Get Replies

8 min

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