Why can't I see any e-mail coming in into my mail-catcher

Question

it's my first time using mail catcher and I was wondering why my code runs through for sending an e-mail but I don't see anything in my mail hog / mail catcher.

Here is how I send my e-mail

Config:

###> symfony/mailer ###
MAILER_DSN=smtp://[email protected]:[email protected]:465
###< symfony/mailer ###

These are the actual live configs, which are in my .env file

Then I shave a simple form

 <section>

                {{ form_start(form, {'attr': {'class': 'custom-form'}}) }}

                <form method="post" action="#">
                    <div class="fields">
                        <div class="field half">
                            {{ form_row(form.name, {'attr': {'class': 'form-row'}}) }}
                        </div>
                        <div class="field half">
                            {{ form_row(form.email, {'attr': {'class': 'form-row'}}) }}
                        </div>
                        <div class="field">
                            {{ form_row(form.message, {'attr': {'class': 'form-row'}}) }}
                        </div>
                    </div>
                    <ul class="actions">
                        {{ form_row(form.submit, {'attr': {'class': 'form-row'}}) }}
                    </ul>
                </form>
            </section>

            {{ form_end(form) }}

And this is how I send my e-mail

    /**
 * @var MailerInterface
 */
private MailerInterface $mailer;

/**
 * @param MailerInterface $mailer
 */
public function __construct(MailerInterface $mailer)
{
    $this->mailer = $mailer;
}


#[Route('/', name: 'app_contact')]
public function index(Request $request)
{
    $form = $this->createForm(ContactFormType::class);
    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {

        $data = $form->getData();

        try {
            $this->sendMail(
                $data['name'],
                $data['email'],
                $data['message'],
            );
            
        } catch (\Exception $e) {

            $e->getMessage();


        }

        header('/');

      //  return $this->render('contact/success.html.twig');

    }



    return $this->render('contact/contact.html.twig', [
        'form' => $form->createView()
    ]);
}

/**
 * @param MailerInterface $mailer
 * @throws \Symfony\Component\Mailer\Exception\TransportExceptionInterface
 */
public function sendMail($name, $email, $message)
{
    $sendTo = 'contact@build-yourself';

    $email = (new Email())
        ->from($email)
        ->to($sendTo)
        ->subject('Contact Email from: ' . $name)
        ->text($message);

    $this->mailer->send($email);

}

When I debug the send function it says that everything is okay and it runs, why can't I see my sent e-mail inside my mailhog

  mailhog:
image: mailhog/mailhog
ports:
  - 1025:1025 # smtp server
  - 8025:8025 # web ui

Answer 1

Here is how it worked for me

 MAILER_DSN=smtp://mailhog:1025

Answer 2

it seems that you can't upvote an answer if it works for you since you don't have enough reputation but you can answer

what worked for me and what answered some of you, for those using Docker

adding in .env MAILER_DSN=smtp://{container name}:1025

I was using the schickling/mailcatcher docker image for mailcatcher and the MAILER_DSN=smtp://mailer:1025 worked