---
title: "Check a from-address before sending"
method: GET
path: "/domains/check-deliverability"
tags: ["Domains"]
---

# Check a from-address before sending

`GET /domains/check-deliverability`

## Request

- Base URL: `https://api.poststack.dev`
- URL: `https://api.poststack.dev/domains/check-deliverability`
- Auth: one of:
  - HTTP bearer
  - OAuth 2
    - Authorization code: `https://poststack.dev/oauth/authorize`
    - Token URL: `https://poststack.dev/oauth/token`
- TypeScript: <https://skmtc.dev/poststack/apis/poststack-api/docs/domains/check-deliverability/get.ts> (a function with typed inputs; its response is checked against the schema)

## Query parameters

- `from` string, required

## Response `200`

Verification state of the sending domain, 30-day bounce/complaint rates and warnings.

- object
  - `from` string
  - `domain` string
  - `domain_id` integer
  - `domain_verified` boolean
  - `domain_status` string
  - `dkim` object
    - `configured` boolean
    - `verified` boolean
  - `spf` object
    - `configured` boolean
    - `verified` boolean
  - `dmarc` object
    - `configured` boolean
    - `verified` boolean
  - `return_path` object
    - `configured` boolean
    - `verified` boolean
  - `volume_30d` object
  - `bounce_rate` number
  - `complaint_rate` number
  - `warnings` object[]
    - `severity` string
    - `code` string
    - `message` string

## Other responses

- `400`: `from` missing or has no domain.
- `401`: Missing, malformed or unknown credentials (`WWW-Authenticate: Bearer …` is set).
- `403`: The credential lacks the `domains:read` scope (body `{ error: "insufficient_scope", required, missing }`), or the team is suspended.

## Changes

- **2026-09-30** `4dc1e20989c8`: 9 warning
  - added the new `daily_limit_exceeded` enum value to the `anyOf[#/components/schemas/Error]/code` response property for the response status `403`
  - added the new `daily_limit_exceeded` enum value to the `code` response property for the response status `400`
  - added the new `daily_limit_exceeded` enum value to the `code` response property for the response status `401`
  - added the new `monthly_limit_exceeded` enum value to the `anyOf[#/components/schemas/Error]/code` response property for the response status `403`
  - …5 more
- **2026-09-29** `ef5b22b98333`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/poststack/apis/poststack-api/changes/domains/check-deliverability/get.md)

---

[API](https://skmtc.dev/poststack/apis/poststack-api.md) - [All operations](https://skmtc.dev/poststack/apis/poststack-api/llms.txt) - [OpenAPI document](https://skmtc.dev/poststack/apis/poststack-api/revisions/0d3971e3a670?raw)