> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mailofly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sending accounts

# Connect a sending account

A **sending account** is how Mailofly delivers mail — your SMTP server, Google mailbox, or verified domain.

Manage them in **[Accounts](https://www.mailofly.com/user/accounts)**.

***

## Choose a provider

| Provider   | Best for                                    |
| ---------- | ------------------------------------------- |
| **Google** | Gmail / Google Workspace                    |
| **SMTP**   | SendGrid, Mailgun, SES, cPanel, self-hosted |
| **Domain** | Branded `@yourdomain.com` (needs DNS first) |

After connecting, send a **test email** from the account card.

***

## Account key

Every account has an **account key** (`acc_…`) on the Accounts page. Optional for the [Emails API](https://docs.mailofly.com/api/emails) and SDKs:

```json theme={null}
{
  "from": "Acme <hello@yourdomain.com>",
  "to": ["you@example.com"],
  "subject": "Hello",
  "html": "<p>Hi</p>",
  "account_key": "acc_xxxxxxxx"
}
```

***

## Daily limits

Mailofly tracks sends per account per day:

* **SMTP** — configurable (default 500/day)
* **Google** — 500/day
* **Domain** — no Mailofly-enforced daily cap

Over-quota recipients are marked `deferred` and retry the next day.

<Info>
  New domains: start at 50–100 emails/day and ramp up over 2–4 weeks.
</Info>

***

## Next

* [Domains & DNS](https://docs.mailofly.com/guides/domains) — SPF, DKIM, DMARC
* [Email types](email-types.md) — Compose vs Campaigns
* [Sending examples](sending-examples.md)


## Related topics

- [Introduction](/api/index.md)
- [Email types](/getting-started/email-types.md)
- [Php](/getting-started/php.md)
- [Python](/getting-started/python.md)
- [Go](/getting-started/go.md)