# Linking Mailgun as a source - Docs

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Let AI connect your sources for you

Skip the manual setup — run this in your project and the wizard auto-detects your databases and APIs and connects them to PostHog.

`npx @posthog/wizard warehouse`

[Learn more](/wizard.md)

![PostHog Wizard hedgehog](https://res.cloudinary.com/dmukukwp6/image/upload/wizard_3f8bb7a240.png)

**Alpha release**

This source is currently in **alpha**. The interface and available tables may change.

The Mailgun connector syncs your transactional and bulk email data into PostHog, including events, bounces, complaints, unsubscribes, templates, and more.

## Adding a data source

1.  Go to the [sources tab](https://app.posthog.com/data-management/sources) of the data pipeline section in PostHog.
2.  Click **\+ New source** and then click **Link** next to Mailgun.
3.  Enter your **Private API key**. You can find this in the [Mailgun dashboard](https://app.mailgun.com/settings/api_security) under **Settings** > **API security**.
4.  Select your **Region** — choose **US** (`api.mailgun.net`) or **EU** (`api.eu.mailgun.net`) to match where your Mailgun account is hosted.
5.  Click **Next**.
6.  Select the tables you want to sync, set the sync method and frequency, then click **Import**.

Once the syncs are complete, you can start using Mailgun data in PostHog.

## Available tables

| Table | Description | Sync method |
| --- | --- | --- |
| domains | Sending domains configured in your Mailgun account | Full refresh |
| events | Email events such as deliveries, opens, clicks, and bounces | Incremental |
| bounces | Bounced email addresses per domain | Full refresh |
| complaints | Spam complaint addresses per domain | Full refresh |
| unsubscribes | Unsubscribed addresses per domain | Full refresh |
| mailing_lists | Mailing lists | Full refresh |
| tags | Tags per domain | Full refresh |
| templates | Email templates per domain | Full refresh |

**Incremental** tables sync only new records on each run. **Full refresh** tables reload all data on each sync.

## Sync limitations

-   **Incremental sync for events only** – Only the `events` table supports incremental syncing using the `timestamp` field. All other tables use full refresh because those Mailgun API endpoints don't expose a server-side time filter.

-   **Event retention limits** – Mailgun retains events for a limited period depending on your plan (1 day on free plans, up to 30 days on paid plans). The initial events sync is bounded by your plan's retention window.

-   **30-minute event lag** – Events sync with a 30-minute lag to account for Mailgun's eventual consistency. Recent events within this window appear on the next sync.

-   **Domain-scoped data** – Most tables (`events`, `bounces`, `complaints`, `unsubscribes`, `tags`, `templates`) are scoped per sending domain. The source automatically enumerates all your domains and syncs data for each one. A `domain` column is added to these tables so records stay unique across domains.

## Configuration

| Option | Type | Required |
| --- | --- | --- |
| Private API key | password | Yes |
| Region | select | Yes |

## Supported tables

| Table | Description | Sync method | Incremental field | Primary key |
| --- | --- | --- | --- | --- |
| domains | A sending domain configured on the Mailgun account. | Full refresh | — | — |
| events | An event in the Mailgun event log (delivered, opened, clicked, bounced, etc.) for a domain. | Incremental, Full refresh | timestamp | — |
| bounces | A bounced recipient address recorded for a domain in Mailgun's suppression list. | Full refresh | — | — |
| complaints | A spam complaint recorded for a domain in Mailgun's suppression list. | Full refresh | — | — |
| unsubscribes | An unsubscribed recipient address recorded for a domain in Mailgun's suppression list. | Full refresh | — | — |
| mailing_lists | A mailing list configured on the Mailgun account, addressable by a single list address. | Full refresh | — | — |
| tags | A tag used to categorize and track messages for a domain in Mailgun. | Full refresh | — | — |
| templates | A stored, reusable message template for a domain in Mailgun. | Full refresh | — | — |

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