Delivery logs

Searchable metadata from queue to recipient-server accept or failure.

Production checklist

Verify ownership of the From domain. Publish the supplied DKIM record and authorize the return-path infrastructure through SPF.

Authentication terminology

Postline DKIM-signs messages. SPF is an authorization policy published in DNS. DMARC evaluates alignment between the visible From domain and an authenticated SPF or DKIM identity; SPF and DMARC are not applied as message signatures.

Delivery outcomes

A recipient server accepting a message does not prove inbox placement. Treat accepted, deferred, hard bounce, soft bounce, complaint, suppressed, spam placement, and inbox placement as different outcomes.

Current access model

Current dashboard keys use srs_live_. Before a customer From-domain is verified, use the shared sandbox sender only for project-member recipients. After DNS verification, external sending is governed by plan quotas, suppression, recipient throttles, and abuse controls. A 202 response means queued, not delivered.

GET /v1/emails/{id}

GET /v1/emails/msg_9c31...

{
  "id": "msg_9c31...",
  "status": "bounced",
  "type": "hard",
  "queued_at": "2026-08-07T11:30:00Z",
  "event_at": "2026-08-07T11:30:42Z"
}

Delivery logs

Resources