anonaddy/app/CustomMailDriver/CustomSendmailTransport.php

<?php

namespace App\CustomMailDriver;

use Swift_AddressEncoderException;
use Swift_DependencyContainer;
use Swift_Events_SendEvent;
use Swift_Mime_SimpleMessage;
use Swift_Transport_SendmailTransport;
use Swift_TransportException;

class CustomSendmailTransport extends Swift_Transport_SendmailTransport
{
    /**
     * Create a new SendmailTransport, optionally using $command for sending.
     *
     * @param string $command
     */
    public function __construct($command = '/usr/sbin/sendmail -bs')
    {
        \call_user_func_array(
            [$this, 'Swift_Transport_SendmailTransport::__construct'],
            Swift_DependencyContainer::getInstance()
                ->createDependenciesFor('transport.sendmail')
        );

        $this->setCommand($command);
    }

    /**
     * Send the given Message.
     *
     * Recipient/sender data will be retrieved from the Message API.
     * The return value is the number of recipients who were accepted for delivery.
     *
     * @param string[] $failedRecipients An array of failures by-reference
     *
     * @return int
     */
    public function send(Swift_Mime_SimpleMessage $message, &$failedRecipients = null)
    {
        if (!$this->isStarted()) {
            $this->start();
        }

        $sent = 0;
        $failedRecipients = (array) $failedRecipients;

        if ($evt = $this->eventDispatcher->createSendEvent($this, $message)) {
            $this->eventDispatcher->dispatchEvent($evt, 'beforeSendPerformed');
            if ($evt->bubbleCancelled()) {
                return 0;
            }
        }

        if (!$reversePath = $this->getReversePath($message)) {
            $this->throwException(new Swift_TransportException('Cannot send message without a sender address'));
        }

        $to = (array) $message->getTo();
        $cc = (array) $message->getCc();
        $tos = array_merge($to, $cc);
        $bcc = (array) $message->getBcc();

        $message->setBcc([]);

        // This allows us to have the To: header set as the alias whilst still delivering to the correct RCPT TO.
        if ($aliasTo = $message->getHeaders()->get('Alias-To')) {
            $message->setTo($aliasTo->getFieldBodyModel());
            $message->getHeaders()->remove('Alias-To');
        }

        try {
            $sent += $this->sendTo($message, $reversePath, $tos, $failedRecipients);
            $sent += $this->sendBcc($message, $reversePath, $bcc, $failedRecipients);
        } finally {
            $message->setBcc($bcc);
        }

        if ($evt) {
            if ($sent == \count($to) + \count($cc) + \count($bcc)) {
                $evt->setResult(Swift_Events_SendEvent::RESULT_SUCCESS);
            } elseif ($sent > 0) {
                $evt->setResult(Swift_Events_SendEvent::RESULT_TENTATIVE);
            } else {
                $evt->setResult(Swift_Events_SendEvent::RESULT_FAILED);
            }
            $evt->setFailedRecipients($failedRecipients);
            $this->eventDispatcher->dispatchEvent($evt, 'sendPerformed');
        }

        $message->generateId(); //Make sure a new Message ID is used

        return $sent;
    }

    /** Send a message to the given To: recipients */
    private function sendTo(Swift_Mime_SimpleMessage $message, $reversePath, array $to, array &$failedRecipients)
    {
        if (empty($to)) {
            return 0;
        }

        return $this->doMailTransaction(
            $message,
            $reversePath,
            array_keys($to),
            $failedRecipients
        );
    }

    /** Send a message to all Bcc: recipients */
    private function sendBcc(Swift_Mime_SimpleMessage $message, $reversePath, array $bcc, array &$failedRecipients)
    {
        $sent = 0;
        foreach ($bcc as $forwardPath => $name) {
            $message->setBcc([$forwardPath => $name]);
            $sent += $this->doMailTransaction(
                $message,
                $reversePath,
                [$forwardPath],
                $failedRecipients
            );
        }

        return $sent;
    }

    /** Send an email to the given recipients from the given reverse path */
    private function doMailTransaction($message, $reversePath, array $recipients, array &$failedRecipients)
    {
        $sent = 0;
        $this->doMailFromCommand($reversePath);
        foreach ($recipients as $forwardPath) {
            try {
                $this->doRcptToCommand($forwardPath);
                ++$sent;
            } catch (Swift_TransportException $e) {
                $failedRecipients[] = $forwardPath;
            } catch (Swift_AddressEncoderException $e) {
                $failedRecipients[] = $forwardPath;
            }
        }

        if (0 != $sent) {
            $sent += \count($failedRecipients);
            $this->doDataCommand($failedRecipients);
            $sent -= \count($failedRecipients);

            $this->streamMessage($message);
        } else {
            $this->reset();
        }

        return $sent;
    }
}