> For the complete documentation index, see [llms.txt](https://docs.mailofly.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mailofly.com/changelog/readme.md).

# External integrations

Connect Mailofly to your email infrastructure, workspace tools, and automation stack.

{% hint style="info" %}
Mailofly is **bring-your-own-transport** — you keep your ESP contracts and domain reputation while Mailofly handles audiences, templates, and delivery orchestration.
{% endhint %}

***

## Integration map

| Integration            | Status               | Guide                                                                   |
| ---------------------- | -------------------- | ----------------------------------------------------------------------- |
| SMTP providers         | ✓ Available          | [SMTP providers](/changelog/email-infrastructure/smtp-providers.md)     |
| Google Workspace       | ✓ Available          | [Google Workspace](/changelog/email-infrastructure/google-workspace.md) |
| REST API               | ✓ Available          | [API overview](https://docs.mailofly.com/api)                           |
| Google Sheets segments | ✓ Available (Basic+) | [Contacts guide](https://docs.mailofly.com/guides/contacts)             |
| Webhooks               | 🔜 Roadmap           | [Webhooks](/changelog/automation/webhooks.md)                           |
| Zapier / n8n           | Via API              | [REST API automation](/changelog/automation/rest-api-automation.md)     |

***

## Architecture

```
Your app / CRM / script
        │
        ▼
  Mailofly REST API  ──→  Contacts, Templates, Campaigns
        │
        ▼
  Sending accounts   ──→  SMTP / Google / Domain relay (SES)
        │
        ▼
  Recipient inbox
```

Mailofly sits between your business logic and your mail transport — it doesn't replace your ESP, it orchestrates sends through it.

***

## Choose your path

{% tabs %}
{% tab title="Transactional email" %}
Use [**Compose API**](https://docs.mailofly.com/api/compose) with an `acc_` account key. Ideal for order confirmations, password resets, and alerts from your backend.
{% endtab %}

{% tab title="Marketing campaigns" %}
Use [**Campaigns API**](https://docs.mailofly.com/api/campaigns) + [**Segments**](https://docs.mailofly.com/api/segments). Schedule recurring sends or trigger manual blasts.
{% endtab %}

{% tab title="Live audiences" %}
Connect a [**Google Sheet**](https://docs.mailofly.com/guides/contacts) to a segment. New spreadsheet rows sync into Mailofly automatically.
{% endtab %}
{% endtabs %}

***

## Related

* [Guides overview](https://docs.mailofly.com/guides)
* [API keys](https://docs.mailofly.com/getting-started/api-keys)
* [Domains & DNS](https://docs.mailofly.com/guides/domains)


---

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