Before launching any cold email campaigns, warming up your email accounts is essential. It protects your sender reputation, prevents emails from landing in spam, and ensures long-term deliverability success, whether you’re using your own connected domains or our Done-For-You (DFY) mailboxes.
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In this guide, you’ll learn:

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Warming up means gradually increasing your sending volume from a new or dormant email account. This process simulates real email behavior, sending, receiving, opening, and replying to emails, to build trust with Email Service Providers (ESPs) like Gmail and Outlook.
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All new mailboxes follow an automated warm-up schedule, increasing daily sends in small increments. The goal is to mimic human activity and avoid red flags.

It automatically warms up your connected email accounts in the background. But if you want more control over how your ramp-up progresses, you can customize the schedule for each account directly.

Step 1: Log in to your account and click the Accounts icon on the left side of the interface.

Step 2: This will navigate to the Email Account Tab, where you will see all the connected emails.

Note: No action required—this process runs automatically in the background.

Step 3: Configure your email warm-up schedule manually by adjusting daily limits or generating a fully custom plan. For more information, refer to this document.

Step 4: Make sure your domain DNS records - SPF, DKIM, and DMARC are correctly configured. These records prove your identity to email providers and are critical for delivering emails to the inbox instead of the spam folder. For more, refer to this document.

If you purchase mailboxes through Done-For-You (DFY) service, you get built-in, continuous warm-up, even after the initial 6-week ramp-up period. Here’s what that means:

For more information on how to add a DFY account, refer to this document.

Note: You may notice emails in your DFY inbox that seem out of place. These are part of the automated warm-up and nothing to worry about.

Keep a close eye on your warm-up performance with the Mailbox Stats chart. This visual tool tracks your daily email activity, showing how many emails were sent compared to the maximum allowed for each day.

By spotting gaps or dips in sending volume, you can quickly detect issues like throttling or deliverability drops and take action before they affect your campaign results.