# Mail best practices

## Queue slow mail delivery

Implement ___SINGLE_BACKTICK___ShouldQueue___SINGLE_BACKTICK___ on a mailable when delivery should normally happen in the background. Laravel queues that mailable even when the call site uses ___SINGLE_BACKTICK___Mail::send()___SINGLE_BACKTICK___.

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class OrderShipped extends Mailable implements ShouldQueue
{
    use Queueable, SerializesModels;
}
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Keep mail synchronous when the caller must know immediately whether delivery was accepted, or when no queue worker is available.

## Dispatch queued mail after commit

A queue worker can process a queued mailable dispatched during a database transaction before the transaction commits. Call ___SINGLE_BACKTICK___afterCommit()___SINGLE_BACKTICK___ on the mailable, or enable the queue connection's ___SINGLE_BACKTICK___after_commit___SINGLE_BACKTICK___ option, when the mail depends on committed records.

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Mail::to($user)->send(
    (new OrderShipped($order))->afterCommit()
);
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If the transaction rolls back, Laravel does not dispatch an after-commit mailable. The after-commit setting affects only queued mail. It does not defer synchronous delivery.

## Assert the delivery mode

Use ___SINGLE_BACKTICK___Mail::assertQueued()___SINGLE_BACKTICK___ for queued mailables and ___SINGLE_BACKTICK___Mail::assertSent()___SINGLE_BACKTICK___ for synchronously sent mailables.

Incorrect for a mailable that implements ___SINGLE_BACKTICK___ShouldQueue___SINGLE_BACKTICK___:

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Mail::assertSent(OrderShipped::class);
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Correct:

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Mail::assertQueued(OrderShipped::class);
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## Use Markdown mailables when they fit

Markdown mailables render HTML and plain-text versions from Laravel's mail components and support publishable themes. They suit conventional transactional messages. A custom HTML and text pair may fit a specialized design better.

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