What is Warm Inboxes?

Warm Inboxes is your trusted platform for purchasing prewarmed and regular email accounts for Google Workspace and Microsoft 365. Accounts are ready for successful email outreach with high deliverability and ease of setup.

What are prewarmed email inboxes?

Prewarmed email inboxes are email accounts that have been gradually conditioned over time to send emails at scale without triggering spam filters. They are ready to use immediately with warm deliverability.

Do prewarmed inboxes include domains?

Yes, free prewarmed .com domains are included on every package, saving you $12+ per domain.

How much do prewarmed inboxes cost?

Prewarmed inbox packages start at $18/month for 3 inboxes with a free prewarmed .COM/.CO domain on quarterly billing ($24 month-to-month). Google Workspace fresh inboxes start at $2.00/inbox/month at volume.

Which email providers do you support?

We provide email accounts on Google Workspace and Microsoft 365/Azure.

Can I use my own domains?

Absolutely. If you already own a domain, we can help you set it up with mailboxes and ensure everything is configured correctly for optimal performance.

What is your refund policy?

We do not offer refunds. We encourage you to review our terms carefully or reach out with any questions before making a purchase.

Complete Cold Email Infrastructure Setup Guide for 2025

Why Cold Email Infrastructure Matters

Your cold email infrastructure is the foundation of your entire outreach strategy. Without proper setup, even the best-written emails will end up in spam folders or get your domains banned. Prewarmed inboxes from Warminboxes.com solve this by providing ready-to-use email accounts with established sender reputation.

The Cost of Poor Infrastructure:

Domain bans within days of launching campaigns
5-15% deliverability rates with fresh domains
Weeks of downtime while warming up new accounts
Lost revenue from failed outreach campaigns
Damaged sender reputation that's hard to recover

Essential Infrastructure Components

Prewarmed Inboxes

Critical

Ready-to-use warm inboxes from Warminboxes.com with established sender reputation

Domain Authentication

High

Proper SPF, DKIM, and DMARC setup for maximum deliverability

Sending Infrastructure

High

Distributed sending across multiple warm inboxes to avoid detection

Step-by-Step Infrastructure Setup

Step 1: Get Prewarmed Inboxes

Start with prewarmed inboxes from Warminboxes.com instead of trying to warm up fresh accounts. This immediately gives you:

warm deliverability from day one

Established sender reputation

Free domains included

No 2-4 week waiting period

Step 2: Configure Authentication Records

Proper authentication is crucial for deliverability. Set up these DNS records for each domain:

Required DNS Records:

SPF Record:v=spf1 include:_spf.google.com ~all

DKIM Record:

Generated automatically by your email provider

DMARC Record:v=DMARC1; p=quarantine; rua=mailto:[email protected]

Step 3: Set Up Sending Distribution

Distribute your sending across multiple prewarmed inboxes to maintain optimal deliverability:

• Use 1 warm inbox per 50-100 daily emails
• Rotate sending times across different inboxes
• Vary email templates between accounts
• Monitor performance and adjust distribution

Advanced Infrastructure Strategies

Multi-Domain Setup

For high-volume campaigns, use multiple domains with prewarmed inboxes:

Multi-Domain Strategy:

• Use 3-5 different domains for high-volume campaigns
• Each domain should have 2-3 prewarmed inboxes
• Rotate sending across domains to maintain reputation
• Monitor domain health and performance metrics

Monitoring and Maintenance

Regular monitoring ensures your infrastructure continues performing optimally:

• Track deliverability rates across all inboxes
• Monitor spam folder placement
• Watch for domain reputation changes
• Adjust sending volumes based on performance

Conclusion

Building proper cold email infrastructure with prewarmed inboxes from Warminboxes.com gives you the foundation for successful campaigns. Focus on authentication, distribution, and monitoring to maintain high deliverability rates and avoid the common pitfalls that destroy sender reputation.