In Laravel, when dealing with mailables and custom headers, the Return-Path header is a special case because it requires a specific type of header object in Symfony's Mime component. The error you're encountering is due to the fact that the Return-Path header must be an instance of Symfony\Component\Mime\Header\PathHeader, rather than a generic UnstructuredHeader.
To set the Return-Path header correctly, you need to use the withSymfonyMessage method to directly manipulate the underlying Symfony Email object. Here's how you can do it:
use Illuminate\Mail\Mailable;
use Symfony\Component\Mime\Email;
class YourMailable extends Mailable
{
public function build()
{
$this->view('emails.your_view');
$this->withSymfonyMessage(function (Email $message) {
$message->getHeaders()->addPathHeader('Return-Path', '[email protected]');
});
return $this;
}
}
Explanation:
- withSymfonyMessage: This method allows you to access the underlying Symfony
Emailobject, which gives you more control over the email headers. - addPathHeader: This method is used to add a
PathHeader, which is the correct type for theReturn-Pathheader.
The reason other headers work without issue is that they can be represented as UnstructuredHeader, which is the default type for most headers. However, Return-Path is a special header that requires a specific format, hence the need for PathHeader.
By using the withSymfonyMessage method, you ensure that the Return-Path header is set correctly, avoiding the LogicException you encountered.