disabled

The server reported the mailbox as disabled or suspended

The detail behind a mailbox_disabled verdict: the account exists in the provider's directory but is blocked from receiving mail.

appears in
smtp_reason
credits
The verdict is undeliverable, so the lookup is free.

What it means

Closed accounts, suspended users and deprovisioned employees answer this way at providers that distinguish "disabled" from "unknown". Mail is rejected exactly as for a missing mailbox.

What to do

Remove the address; it has joined your suppression list.

Example response

{
    "deliverable": "undeliverable",
    "reason": "mailbox_disabled",
    "smtp_reason": "disabled",
    "mailbox_exists": false
}

Abbreviated: a real answer carries all 27 fields, listed in the verify-email reference.

Related

markdown version: /docs/reasons/disabled.md