mailbox_full

The mailbox exists but is over quota

The handshake found the mailbox and was told it is full, so mail will bounce until the owner clears it.

risk weight: +20
dataset: mailbox-smtp
reads from: smtp_reason
verdict reason: mailbox_full

What it means

The provider's sub-reason comes back as smtp_reason mailbox_full; the mailbox exists, mailbox_exists is true, and the verdict is risky with the mailbox_full reason.

It reads from smtp_reason.

What to do

Retry later rather than dropping the address; pass callback_url to have it re-checked and the settled verdict pushed to you.

Example response

{
    "email": "[email protected]",
    "deliverable": "risky",
    "reason": "mailbox_full",
    "mailbox_exists": true,
    "smtp_reason": "mailbox_full",
    "risk_signals": [
        {
            "signal": "mailbox_full",
            "weight": 20,
            "dataset": "mailbox-smtp"
        }
    ]
}

Abbreviated: a real answer carries all 46 fields, listed in the verify-email reference. The risk_signals entry shown is the one this signal adds; the weights of every entry in the list sum to risk_score.

markdown version: /docs/signals/mailbox_full.md

mailbox_full

What it means

What to do

Example response

Related