What is White Label Email?
White label email is a service that lets platforms send email on behalf of their customers using the customers' own domains and branding, with the platform's infrastructure invisible to the end recipient.
White label email allows SaaS platforms to embed email sending into their product so that every message appears to come directly from the customer's brand—not from the platform. The customer's domain shows in the From address, authentication records (SPF, DKIM, DMARC) are configured for their domain, and tracking links use their subdomain.
This is different from the agency model of white labeling, where a marketing agency rebrands an email marketing tool (like Mailchimp or ActiveCampaign) to look like their own product. In the platform model, the infrastructure itself is invisible: your customers never see or interact with the email provider directly.
White label email requires multi-tenant architecture: each customer (tenant) has their own sending domain, suppression list, analytics, and webhook events—properly scoped so data stays separated between tenants.
Why White Label Email Matters
If your SaaS product sends email on behalf of customers—order confirmations, notifications, invoices, campaign emails—those emails need to come from the customer's domain to land in inboxes and build trust. Sending from a shared or platform domain damages deliverability and breaks the customer's brand experience. White label email solves this by making your email infrastructure invisible.
How Ark Handles White Label Email
Ark is built specifically for white label email. Every email you send through Ark carries your customer's domain, authentication, and branding. Ark handles domain onboarding, DNS verification, per-tenant suppression lists, and per-tenant analytics so your platform can offer email as a native feature without building infrastructure.
Frequently Asked Questions
What is white label email?
White label email is a service where a platform sends email on behalf of its customers using each customer's own domain and branding. The platform's infrastructure is invisible to the end recipient—emails appear to come directly from the customer.
How is white label email different from email marketing tools?
Email marketing tools (Mailchimp, ActiveCampaign) are designed for end users to create campaigns. White label email is infrastructure for platforms that need to embed email sending into their own product, with each customer on their own domain and their data properly scoped.
Is white labeling email legal?
Yes, white labeling is a standard B2B practice. It's simply sending authorized email on behalf of another party. As long as you follow email regulations (CAN-SPAM, GDPR) and properly authenticate sending domains, white label email is completely legal and widely used.
Related Terms
Email API
An email API (Application Programming Interface) allows developers to send, receive, and manage emai...
Multi-Tenant Email
Multi-tenant email is an architecture where a single email platform serves multiple customers (tenan...
Tenant Isolation
Tenant isolation in email ensures that each customer's sending data — suppression lists, analytics, ...
Domain Authentication
Domain authentication is the process of configuring DNS records (SPF, DKIM, DMARC) to prove to inbox...
Sending Domain
A sending domain is the domain used in the From address of emails, configured with DNS records to au...
Ready to improve your email deliverability?
Ark handles white label email and more automatically. Start sending in 5 minutes.