How long does it take before I can start sending with Bundles?

THIS ARTICLE IS FOR: All ListKit customers
​Stage: Onboarding
​Owner: Said
​Last updated: July 2026
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This is one of the most important things to understand before you get started. Knowing the timeline upfront means you can plan accordingly, set the right expectations, and use the waiting period productively instead of wondering why nothing is happening.
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48 to 72 hours: DNS configuration After you complete your domain and inbox setup, ListKit registers your domains and configures all DNS records, SPF, DKIM, and DMARC, fully managed on your behalf. Nothing is required from you during this window.
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1 to 2 business days: Inbox creation Once DNS is configured, your Google inboxes are created and connected to your domains. You will start seeing them appear in the Inboxes tab inside Email Engine.
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2 to 3 weeks warmup: Once your inboxes are created, warmup begins automatically. This is the longest part of the process and the one that cannot be shortened.
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Total: approximately 3 weeks from setup to first campaign live.
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Inbox providers like Gmail evaluate the trustworthiness of sending addresses before deciding whether to deliver emails to the inbox or route them to spam. A brand new inbox with no sending history looks suspicious when it suddenly starts sending hundreds of emails per day.
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Warmup solves this by gradually building that sending history. Your inboxes automatically send and receive low-volume emails in the background over 2 to 3 weeks, establishing a legitimate sender reputation before you ramp up to full campaign volume.
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Skipping warmup, or cutting it short, means your emails go straight to spam. This is not a limitation of ListKit. It is how cold email works everywhere. Every platform, every provider, every inbox requires it. The physics of cold email do not change based on which tool you use.
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The minimum is 2 weeks. 3 weeks is what ListKit recommends for the strongest possible foundation before your first campaign launches.
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You are not just waiting. From day 1, you have access to the Dream 100 Launch Bonus, a training and up to $100 in gift cards to help you run hyper-personalized outreach from your main business inbox while your sending inboxes warm up.
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The strategy is simple: identify your 100 most ideal prospects, send them a short personalized email from your main inbox offering a $25 gift card in exchange for a 15-minute call, and start booking meetings before your cold email campaigns ever launch.
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Most customers who follow through on Dream 100 have pipeline moving before they send their first cold email. See the full guide here: What is the Dream 100 bonus and how do I use it?
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By the end of week 3, your domains are registered, your inboxes are warmed up, and your first campaign is ready to launch. If you have been running Dream 100 in the meantime, you may already have meetings booked and conversations in progress before your campaigns even go live.
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Can I speed up the warmup process? No. Warmup cannot be shortened without risking your deliverability. 2 weeks is the absolute minimum, 3 weeks is strongly recommended.
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My inboxes have been warming up for over 3 weeks, why are they not ready? Reach out to support via Intercom chat or at [email protected] and the team will check the status of your warmup and advise on next steps.
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Can I send any emails at all during warmup? You cannot send cold email campaigns from your warming inboxes during this period. However, you can and should be running Dream 100 outreach from your main business inbox, see: What is the Dream 100 bonus and how do I use it?
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Does the warmup period count from when I subscribe or from when I complete my setup? Warmup begins after your inboxes are created, which happens after DNS configuration is complete. The clock starts from when you complete your domain and inbox setup, not from when you first subscribe.