Master Cold Email: Premium Warm-Up, Mailboxes, and Deliverability

Real Google mailboxes with US IPs, Premium Warm-Up, Copy Warm-Up, and Free Spam Tests—delivered with care and precision.
Enjoy complete domain and mailbox setup within 24 hours, seamlessly integrated into your platform at no extra cost.And for your peace of mind, we offer unlimited mailbox replacements (though you’ll likely never need them)

What’s Included in Every Plan?

Premium Warm-Up Service:
Warm up your mailbox with high-quality interactions. Your messages will be opened, marked as important, and Starred – they won’t simply take them out of spam via API like most platforms. Plus, you can warm up your campaign copy before you start your outbound. Don’t let your copy get spam-flagged ever again.Deliverability Optimization:
We run 1-2 Weekly Spam Tests internally for each and every mailbox to catch any issues in advance and maintain a pristine sender reputation.Enforced cold-to-warm email ratio to maximize inbox placement: At least 70% of the total emails sent are warm-ups.Google Workspace Optimization:
Infrastructure fine-tuned for performance when sending to Google to Google.Easy Integration with Your Platforms:
We integrate seamlessly with tools like Smartlead, Instantly, Reply, or any other alternative you use.

Pricing

$5 per mailbox accounts
Minimum order: 10 accounts
All domain and mailbox setups are included.

Order Request

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Lucas Guimarães Leite LTDAPlease be aware that our business is currently called "Lucas Guimarães Leite LTDA" but we are in the process of renaming to MilkBox within Brazilian law. Invoices will be shipped under our current name while the transition occurs. The transition should be complete by February, 2025.

Address:
AVENIDA PAULISTA, 1106
Sala 01 / Andar 16
Bela Vista, São Paulo, SP, Brazil

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