Should You Use A Subdomain Or New Domain For Cold Email?

Updated June 2024

You should not use subdomains for cold email.

If you use subdomains, then your deliverability will be negatively affected, causing your emails to go to spam.

In this article, I’ll explain why buying new domains is the better option:

- What is a subdomain?
- Is it possible to send emails from a subdomain?
- Should you use a subdomain for cold email?
- Final thoughts

What is a subdomain?

A subdomain is a prefix added to the beginning of a domain to create a separate section on the domain.

For example:

emailchaser.com is a domain.

help.emailchaser.com is a subdomain. “help.” is the subdomain.

If I wanted to create an email account on this subdomain, then I would create [email protected].

The most common reason for creating a subdomain is to build a separate section of a website on it. For example, there is a different website layout/design on www.emailchaser.com and help.emailchaser.com, although both share the same domain. It is like having two different websites on the same domain.

image showing a subdomain in a full url

Is it possible to send emails from a subdomain?

Yes, it is possible to send emails from a subdomain.

image showing a subdomain in an email address

For example, I could create the email account [email protected].

This is different from a traditional email account which doesn’t include a subdomain, such as [email protected].

The reason why some people want to create new email accounts with subdomains is because it doesn’t cost anything to create additional email accounts. You can simply add an unlimited number of new subdomains (and email accounts).

However, I recommend that you don’t use subdomains in your email accounts, for reasons that I’ll explain later in this article.

Should you use a subdomain for cold email?

You should not use subdomains when sending cold emails.

Email service providers don’t like it when email accounts send too many emails as it looks unnatural and spammy.

If you send too many emails from a single domain, then your emails will go to spam.

If you use subdomains to create additional email accounts, then email service providers know that all of your email sending volume is still on the same domain. Using subdomains doesn’t prevent ESPs from seeing that your domain is sending a high volume of emails.

They will eventually mark your emails as spam, due to excessive volume.

The only way to prevent email service providers from knowing that you are sending a high volume of cold emails is by buying new domains, and creating one email account on each domain.

For example, if I was doing this for Emailchaser, then I would buy the following domains:

getemailchaser.com
tryemailchaser.com
emailchaserhq.com
emailchaserapp.com
etc.

Then, I would create one email account on each domain, such as:

[email protected]
[email protected]
[email protected]
[email protected]
etc.

Each domain and email account above would have its own separate Google Workspace account.

Doing the above allows you to scale your cold email outreach without email service providers (like Gmail) knowing that you are sending a high volume of emails.

I recommend that you read my article How Many Cold Emails Can You Send Per Day? In this article, I explain what the safe limit is to avoid going to spam.

Frequently asked questions

What happens if you use subdomains for cold email?

If you use subdomains to send cold emails, then your emails will go to spam. You should instead buy new domains if you want to scale your sending volume.

Why do some people think that subdomains are a good idea?

Some people don’t want to spend a lot of money on their cold email infrastructure, and choose the cheap option (subdomains). These people don’t get results and their emails go to spam.

Final thoughts

You should not use subdomains when creating email accounts for cold email.

Instead, you need to buy new domains; this will ensure that your emails land in the primary inbox (not spam).

On a related note, I recommend that you read the following articles that I wrote:

Should You Send Cold Emails From Your Primary Domain?

What Is The Best Domain Extension For Cold Email?

How Many Email Accounts Can You Create Per Domain For Cold Email?

How To Create Multiple Google Workspace Accounts With One Phone Number

picture of George Wauchope

Article by

George Wauchope

Founder of Emailchaser.

I have been working in the sales & marketing industry for nearly a decade.

When I’m not working on my business, I enjoy eating sushi & doing jiu-jitsu.

About the author