E04010 — OnboardingSendLimitExceeded

The daily send limit for the shared onboarding domain has been reached.

• HTTP status: 429
• Type: rate_limit_error
• Name: OnboardingSendLimitExceeded

What to do

Verify your own sending domain to lift the onboarding send limit, then retry.

Operations that resolve this:

• List sending domains
• Create a sending domain
• Verify a domain

Related

• Rate limits: groups, headers, and backoff guidance
• E04xxx — Email sending & delivery: 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