Puzzle Inbox

Puzzle inbox is a done-for-you inbox provisioning service that solves the single biggest bottleneck in cold email infrastructure: getting properly configured, warmed inboxes into your sending tool without spending days on DNS records, SPF, and warmup sequences.

Unlike most inbox rental services that hand you a raw domain and wish you luck, puzzle inbox handles domain purchasing, DNS configuration, SPF/dkim/dmarc setup, OAuth configuration, and inbox warmup before delivery, so you connect via smtp/imap and start sending.

Agencies managing multiple client campaigns, B2B SaaS founders running their own outbound, and SDR teams that need to scale sending volume without burning their primary domains should look at this tool, with pricing starting at $3 per inbox per month for Google workspace.

Top Features

• Pre-warmed Google workspace and Microsoft Office 365 inboxes available
• Done-for-you domain purchasing, DNS configuration, SPF, dkim, and dmarc setup
• Standard and warmed inbox tiers with 24-72 hour delivery windows
• 500+ domain options available on the warmed plan
• Connect to any cold email tool via smtp/imap
• unified dashboard to manage all inboxes, monitor deliverability, and track warmup status
• WhatsApp support included with all plans
• 70,800+ active inboxes deployed across 1,200+ clients

Pricing

The Standard plan costs $3 per inbox per month and includes official Google workspace inboxes, 3 inboxes per domain, 12 emails per inbox per day, and delivery in 24-72 hours, with SPF, dkim, and dmarc configuration included.

The warmed plan costs $4.50 per inbox per month and adds pre-warmed inboxes that are ready to send immediately, with 500+ domain options available and the same 3 inboxes per domain and 12 emails per inbox per day limits.

Microsoft Office 365 and done-for-you consultation options are also listed on the pricing page, so check their website for current pricing on those tiers.

All plans include dedicated support, and the website lists a starting price of $0.35 per inbox for bulk or alternative configurations.

Who Actually Uses puzzle inbox

The client base listed on the website includes agencies, founders, and outbound sales teams.

One verified user note from the website describes getting 150 users for a B2B SaaS product directly from a cold email setup built on puzzle inbox inboxes.

Another user specifically called out the WhatsApp support speed and deliverability as the reason they switched from managing raw smtp inboxes themselves.

In practice, this tool fits teams that want to outsource the infrastructure layer entirely and focus on copy, targeting, and follow-up sequences instead.

How puzzle inbox fits into a cold email stack

Puzzle inbox is not a sending platform and does not replace tools like instantly or smartlead.

What it does is supply the inboxes those platforms need to function at scale, with all the technical configuration already done.

The workflow is straightforward: you order inboxes, puzzle inbox handles setup and warmup, and you connect the delivered inboxes to your sending tool via smtp/imap.

If you are running campaigns through a platform that requires you to bring your own inboxes, this is the type of service that fills that gap without requiring you to become a dns expert.

deliverability setup: what is actually included

Every inbox comes with SPF, dkim, and dmarc records configured before delivery.

OAuth configuration is also handled, which matters specifically for Google workspace inboxes that require it for certain sending tools.

The warmed plan means the inbox has already gone through a warmup sequence before you receive it, which reduces the time between delivery and when you can safely start sending at volume.

In practice, skipping the warmup period is a meaningful time saver for agencies that need to spin up new client campaigns quickly.

inbox limits and sending volume expectations

Both the standard and warmed plans cap sending at 12 emails per inbox per day based on the official website pricing table.

Note that the capterra listing shows 20 emails per inbox per day, so confirm the current limit directly with puzzle inbox before planning your volume.

The standard approach for scaling volume with this type of service is to add more inboxes rather than increase volume per inbox, which is exactly what puzzle inbox recommends.

For an agency running 10 inboxes on the warmed plan, that is a maximum of 120 targeted emails per day at a cost of $45 per month for the inboxes alone.

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