Do-not-email list
Addresses that unsubscribed or were blocked. Nothing is ever sent to them.
The do-not-email list holds every address that unsubscribed, was marked Unsubscribed, or was blocked by hand. Campaigns, sequences, one-off emails and marketing automations skip them; transactional automations still reach people whose reason is UNSUBSCRIBED, never people with reason MANUAL. See the guide: Unsubscribes and the do-not-email list.
The entry object
{
"id": "66f1c2a9e4b0a1b2c3d4e777",
"email": "jane@northwind.io",
"reason": "UNSUBSCRIBED",
"via": "LINK",
"feedback": "TOO_MANY",
"contactId": "66f1c2a9e4b0a1b2c3d4e5f6",
"outreachNumber": 3,
"source": { "kind": "CAMPAIGN", "id": "66f1c2a9e4b0a1b2c3d4e200", "name": "Spring launch" },
"createdAt": "2026-10-05T09:30:00.000Z"
}Prop
Type
Contacts carry a matching doNotEmail field (reason, via, createdAt, or null), so you can tell from a contact alone whether they can be emailed.