E10009 — MaxCustomHandlesExceeded

Your plan's allowance of custom inbox.ai handles has been reached.

• HTTP status: 422
• Type: validation_error
• Name: MaxCustomHandlesExceeded

What to do

Upgrade your plan for more custom handles, create the mailbox on your own receiving-enabled domain, or omit the local part to get a generated address. A deleted custom handle keeps its slot for 30 days (its restore window), so list the mailboxes with deleted ones included to see what holds the allowance.

Operations that resolve this:

• List mailboxes

Related

• E10xxx — Quotas: 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