InboxKit Whitelabel Guide for Agencies

InboxKit's whitelabel program gives agencies a fully branded email infrastructure platform they can offer to clients as their own product. Your clients see your brand, your domain, and your support. InboxKit powers everything behind the scenes.

What is customizable:

How it works architecturally: 1. InboxKit provides the platform infrastructure (servers, Google/Microsoft provisioning, DNS automation, warmup) 2. You get a branded portal on your domain 3. Your clients access the portal and see only your brand 4. You buy at wholesale, sell at retail 5. InboxKit handles the technical operations

Full whitelabel setup documentation: docs.inboxkit.com

Setup takes about 30 minutes with InboxKit's guided process:

Step 1: Apply for the partner program Contact the InboxKit partner team or apply through inboxkit.com/partners. Whitelabel is available for agencies managing 50+ mailboxes.

• Company name and logo (SVG or PNG, 200x50px recommended)
• Primary brand color (hex code)
• Secondary and accent colors
• Favicon

Step 3: Set up your custom domain Point your chosen subdomain to InboxKit's whitelabel servers:

; DNS records for custom domain
portal.youragency.com  CNAME  whitelabel.inboxkit.com

SSL certificates are provisioned automatically via Let's Encrypt.

Step 4: Configure email notifications Set your sending domain for client-facing emails (welcome emails, alerts, reports). Requires SPF/DKIM configuration on your agency domain.

Step 5: Set pricing and features Choose which features your clients can access and set your retail pricing. You can configure different pricing tiers for different client segments.

See docs.inboxkit.com for detailed branding configuration options.

The partner dashboard gives you a complete client management layer on top of InboxKit's infrastructure:

Client features:

Client onboarding workflow: 1. Create client account in partner dashboard 2. Set their domain and mailbox limits 3. Configure which features they can see 4. Send them login credentials 5. Client manages their own domains and mailboxes within your platform

For agencies managing clients hands-on: You can manage all infrastructure from a single partner dashboard and only give clients read-only access or no access at all. Some agencies prefer to keep all infrastructure management in-house.

See docs.inboxkit.com for client management documentation.

The whitelabel model creates a recurring revenue stream from email infrastructure management. Here is the math:

Wholesale pricing (what you pay InboxKit): Partner pricing varies by volume commitment. Contact the partner team for exact rates.

Retail pricing (what you charge clients): You set your own prices. Common agency pricing models:

Revenue calculator at different scales:

Key insight: Email infrastructure is a sticky, recurring revenue stream. Once clients are set up on your platform, switching costs are high (DNS migration, new warmup cycle). Retention rates for infrastructure services typically exceed 90% annually.

The Partner API extends InboxKit's standard API with multi-tenant capabilities for managing clients programmatically:

# List all clients
curl -H "Authorization: Bearer PARTNER_API_KEY" \
  https://api.inboxkit.com/v1/partner/clients
# Create a new client
curl -X POST -H "Authorization: Bearer PARTNER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name": "Acme Corp", "email": "admin@acme.com", "maxMailboxes": 50}' \
  https://api.inboxkit.com/v1/partner/clients
# Provision mailboxes for a client
curl -X POST -H "Authorization: Bearer PARTNER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"clientId": "client_123", "email": "outreach@acmedomain.com", "provider": "google"}' \
  https://api.inboxkit.com/v1/partner/mailboxes

Partner-specific endpoints:

Full partner API documentation: docs.inboxkit.com

Agencies have two options for offering email infrastructure to clients: whitelabel (branded platform) or direct reselling (managing InboxKit accounts on behalf of clients).

Here is how they compare:

Based on our most successful whitelabel partners, here is the playbook for building a profitable email infrastructure offering:

• Set up whitelabel portal with your branding
• Create 3 pricing tiers (starter, growth, agency)
• Onboard your first 2-3 existing clients
• Build internal documentation for your team

• Add infrastructure as an upsell to existing campaign management clients
• Create a landing page for your branded infrastructure service
• Build onboarding automation using the Partner API
• Target agencies that need infrastructure for their clients

• Automate client provisioning and billing
• Add monitoring dashboards to your client reporting
• Build case studies from early clients
• Consider offering infrastructure-only plans for non-campaign clients

Pricing strategy that works: Start at $5-6/mailbox/mo for clients. This gives you healthy margins while remaining competitive with direct InboxKit pricing. Clients pay a premium for your support, expertise, and bundled services.

The support question: The #1 concern agencies have about whitelabel is support burden. In practice, InboxKit's automation handles 90% of infrastructure operations. The support you provide is primarily onboarding guidance and campaign strategy. which is your expertise anyway.

Ready to get started? Apply at inboxkit.com/partners or see the full whitelabel documentation at docs.inboxkit.com.