> For the complete documentation index, see [llms.txt](https://quantumphp.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://quantumphp.gitbook.io/docs/packages/mailer/helpers.md).

# Helpers

The package exposes one global resolver helper.

## `mailer()`

```php
function mailer(?string $adapter = null): Mailer
```

Use this when you want the shared `Quantum\Mailer\Mailer` wrapper.

```php
mailer()
    ->setFrom('noreply@example.com', 'Example App')
    ->setAddress('jane@example.com', 'Jane')
    ->setSubject('Welcome')
    ->setBody('<p>Hello</p>')
    ->send();
```

Pass an adapter name when you need a specific transport:

```php
use Quantum\Mailer\Enums\MailerType;

mailer(MailerType::SMTP)
    ->setFrom('noreply@example.com', 'Example App')
    ->setAddress('ops@example.com')
    ->setSubject('Nightly report')
    ->setBody('<p>Done</p>')
    ->send();
```

## Helper behavior

A few limits are easy to miss:

* `mailer()` resolves through `MailerFactory::get()`, so repeated calls reuse the cached wrapper for that adapter name
* the returned object is a proxy, not the adapter itself
* adapter-specific methods work only when the current adapter implements them
* unsupported method calls throw a mailer exception

Example of using an SMTP-only method:

```php
mailer(MailerType::SMTP)
    ->setFrom('noreply@example.com', 'Example App')
    ->setAddress('jane@example.com')
    ->setReplay('support@example.com', 'Support')
    ->send();
```

If you switch that example to a non-SMTP adapter, the proxy call will fail because the method does not exist on that adapter.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://quantumphp.gitbook.io/docs/packages/mailer/helpers.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.