setBaseUrl('../../../src/DebugBar/Resources'); $mailCollector = new SymfonyMailCollector(); $mailCollector->showMessageDetail(); $mailCollector->showMessageBody(); $debugbar->addCollector($mailCollector); $logger = new MessagesCollector('mails'); $debugbar['messages']->aggregate($logger); // Add even listener for SentMessageEvent $dispatcher = new EventDispatcher(); $dispatcher->addListener(SentMessageEvent::class, function (SentMessageEvent $event) use ($mailCollector): void { $mailCollector->addSymfonyMessage($event->getMessage()); }); // Creates NullTransport Mailer for testing $mailer = new Mailer(new class ($dispatcher, $logger) extends AbstractTransport { protected function doSend(\Symfony\Component\Mailer\SentMessage $message): void { $this->getLogger()->debug('Sending message "'.$message->getOriginalMessage()->getSubject().'"'); } public function __toString(): string{ return 'null://'; } }); $email = (new Email()) ->from('john@doe.com') ->to('you@example.com') //->cc('cc@example.com') //->bcc('bcc@example.com') //->replyTo('fabien@example.com') //->priority(Email::PRIORITY_HIGH) ->subject('Wonderful Subject') ->html('

Here is the message itself

'); $mailer->send($email); render_demo_page();