All features/Platform/Custom Sending Domains
Platform

Custom Sending Domains.

Bulk ESP sends as hello@yourcompany.com.

Resend-verified domains for high-volume campaign delivery — separate from hosted mailboxes so marketing blasts get their own deliverability tuning.

SOC 2
Type II ready
BYO
AI keys per org
99.9%
Uptime target
Workspace settings
AI provider
Claude: BYO key
SSO
SAML: Okta
Audit log
30 days retained
Data region
us-east-1
Overview

Everything custom sending domains does, in one place.

Hosted mailboxes are perfect for 1:1 sales and team inboxes. Custom sending domains are for the newsletter and drip sequences that need ESP-grade throughput.

Verify your domain once with Resend, pick it as the From address on any campaign, and keep bulk reputation isolated from your primary mailboxes.

Capabilities

Every capability in Custom Sending Domains.

01

Resend domain verification

02

Per-campaign From domain selection

03

Isolated deliverability from hosted mail

04

Works alongside warmup on hosted mailboxes

How it works

Set up once. Use it every day.

1

Set up your org

Create an organization, invite your team and connect your domains and social accounts once.

2

Configure safely

Bring your own AI keys, set rate limits, rotate credentials and lock down sensitive exports.

3

Scale securely

Multi-tenant isolation, audit logs and SSO keep you compliant as your footprint grows.

Who it's for

Built for marketing teams of every size.

Security-conscious teams

Least-privilege service keys, audit trails and SSO, ready for a security review.

Multi-brand companies

Separate orgs per brand with isolated data, billing and AI usage.

Enterprises

Dedicated environments, custom DPAs and a named CSM on Enterprise plans.

FAQ

Questions, answered.

How is data isolated between organizations?+

Every record is scoped by org_id and enforced in application code with least-privilege service keys.

What AI providers can I plug in?+

Claude (Anthropic) and Grok (xAI) ship out of the box. OpenAI and Perplexity are supported for research.

Can we self-host?+

Managed cloud today. A single-tenant deployment option is available on Enterprise.

What certifications are in place?+

SOC 2 Type II readiness, GDPR and CCPA support. DPAs are available on request.

Ready to ship

Put Custom Sending Domains to work today.

Free to try. No credit card needed. Set up in under five minutes.