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relay

The address is a permanent alias at a forwarding service

Firefox Relay, SimpleLogin, Addy.io, DuckDuckGo Email Protection and their kind deliver to a real person's mailbox under a name they control; the identity is withheld, not the mailbox.

risk weight
+5
dataset
forwarding-services
reads from
is_relay
verdict reason
none: a score-only signal

What it means

The relay list is read before the burner list, so a relay domain is never disposable: this weight of 5 replaces the disposable 80. The mailbox is probed like any other and domain_category answers relay.

It reads from is_relay, relay_service names the service, and it comes with no verdict reason.

What to do

Accept it. The owner can switch the alias off, which is a reason to stay worth reading rather than a reason to refuse.

Example response

{
    "email": "[email protected]",
    "deliverable": "deliverable",
    "is_relay": true,
    "relay_service": "Firefox Relay",
    "disposable": false,
    "risk_signals": [
        {
            "signal": "relay",
            "weight": 5,
            "dataset": "forwarding-services"
        }
    ]
}

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.

Related

markdown version: /docs/signals/relay.md