Free Email Warmup Tool (+ Best Strategies and More)

That’s a wrap! The warm-up service has officially ended and can’t be used anymore. To understand why, please see this post.

Email warmup is an eternally hot topic in the cold email community. So we created a tool you can use to warm up an email address for free. We have since shuttered that tool to comply with Google policies.

Here’s everything you could possibly need to know about email warmup.

Email Warmup: Table of Contents

• What Is Email Warmup?
• Why Do I Need to Warm Up My New Email Account?
• How to Get Started with Email Warmup for Improved Deliverability
• Live Daily Warmup Stats from the SendHustle Free Email Warmup Tool
• 8 Popular Email Warmup Tools: A Comparison
• Email Warmup FAQ and Troubleshooting
• Email Warmup: Next Steps

What Is Email Warmup?

Email warmup is the process of building trust for an email account so its emails, especially cold and mass emails, go to recipients’ inboxes and not their spam folders.

Email warmup tools use an automated system to improve the reputation for your account, increase its sending limit, and boost its deliverability.

However… warmup services are now against many email providers’ terms. SendHustle no longer offers a warmup service.

An email warmup tool will:

• Send email from your account to other designated accounts
• Open those emails and “read” them
• Respond to a strategic percentage of your emails
• Mark them as “not spam” if they go to the spam folder
• Mark some as “important”

That lets email clients know you’re sending valuable, anticipated emails that recipients want — which are the exact types of emails that make it to the inbox, not the spam folder.

The email warmup tools will start by sending a small number of emails, then gradually ramp up from there.

As much as it’s tempting to jack up the pace to try to get your account warmed up faster, the slow ramp up is strategic. It simulates a normal cadence and helps train algorithms to see that emails coming from your email account are desirable and highly engaging.

All of this warming up serves one main purpose: You’re “priming” your account for bigger campaigns. And, in the case of cold emails and mass emails, you’ll be sending campaigns featuring lots of very similar messages.

Once your address is warm, the email clients shouldn’t blink at a cold email or mass email campaign — after all, you now have a reputation for sending high volumes of quality emails that belong in people’s inboxes.

Why Might I Want to Warm Up My New Email Account?

A new email account needs “warm up” to increase deliverability and establish trust as a valid email account, not a spam account.

Warming up a new e-mail address, and especially a new domain, is important in order to:

1. Be able to send your full limits.
2. Get the best possible deliverability to the inbox.
3. Minimize the chance that your account gets suspended for suspicious activity. (Though email warmup is against the terms of service, so you could get suspended for that.)

So should I consider warming up an old email account too?

If you’re going to use an existing email account for high-volume sends, cold email, email marketing, and/or other mass emails — and you’re not afraid of it potentially getting suspended for using warmup — then you can consider the service. That way, you’ll train the email clients to anticipate larger campaigns from you — and that those campaigns belong in people’s inboxes.