E05000 — DomainAlreadyExists

A sending domain with this name is already registered in this workspace.

• HTTP status: 409
• Type: conflict_error
• Name: DomainAlreadyExists

What to do

This domain is already registered. Look it up and reuse or verify it instead of re-creating it.

Operations that resolve this:

• List sending domains
• Get a sending domain

Related

• Idempotency: safe retries and key reuse rules
• E05xxx — Domains & DNS: every code in this range
• Errors: the full wire contract, status mapping, and error catalog
• Error handling: branching on type and code, validation details, and vendor_code