Features — Puzzle Inbox Cold Email Infrastructure

Pre-warmed Google Workspace and Outlook 365 cold email inboxes with DNS authentication done for you, fast WhatsApp support, and a track record across 13,000+ active inboxes serving 300+ agency clients.

Real Google Workspace and Microsoft 365

Authentic accounts you can access via admin.google.com or admin.microsoft.com — not shared subaccounts or aliased SMTP. Inherit Google's and Microsoft's established IP reputation for cold email deliverability.

Pre-warming included

Inboxes arrive with established sending reputation. Eliminates 2–3 weeks of self-warmup and the $15–25/inbox/month warmup tool subscription required by self-warmed alternatives.

DNS authentication done for you

SPF, DKIM, DMARC, MX records correctly configured and verified before inbox delivery. No DNS troubleshooting required on your side.

WhatsApp support, 15-minute response

Support that operates at agency speed. When an inbox suspends mid-campaign, support responds in minutes — not 24–48 hours.

Dual-platform coverage

Google Workspace at $3–4.50/inbox and Outlook 365 at $0.35/inbox. Diversify across platforms to match prospect inbox provider distribution.

Bulk provisioning for agencies

Order 100+ inboxes in one workflow with diversified registrar, naming, and provisioning patterns. Reduces suspension risk vs bulk-flat-rate alternatives.

Account replacement policy

Suspended accounts replaced as part of service. No surprise charges for replacements — built into the per-inbox model.

13,000+ active inboxes

Operational scale validated by 300+ agency clients. Documented deliverability consistency across verticals and prospect types.