E05020 — InboundNotConfigured

HTTP status: <span class="text-code bg-card rounded-sm border px-1 font-mono group-[&amp;]/code-block:rounded-none group-[&amp;]/code-block:border-none group-[&amp;]/code-block:bg-transparent group-[&amp;]/code-block:p-0">501
Type: <span class="text-code bg-card rounded-sm border px-1 font-mono group-[&amp;]/code-block:rounded-none group-[&amp;]/code-block:border-none group-[&amp;]/code-block:bg-transparent group-[&amp;]/code-block:p-0">not_implemented_error
Name: <span class="text-code bg-card rounded-sm border px-1 font-mono group-[&amp;]/code-block:rounded-none group-[&amp;]/code-block:border-none group-[&amp;]/code-block:bg-transparent group-[&amp;]/code-block:p-0">InboundNotConfigured

Inbound mail receiving is not yet available for your account. Contact support to have it enabled.

What to do

Inbound receiving is provisioned for your account rather than toggled per request; contact support to have it enabled, then create the address.