Swiftmailer remove attachment after send

Question

I am trying to remove the attachment files after sending an email with Symfony 2.1 and Swiftmailer but if I delete the file before returnin

Answer 1

In order to complete the very good answer of james_t, if you use multiple mailers some changes are needed.

Replace

//  Default mailer
$mailer = $this->container->get('mailer');

$subject  = '...';
$from     = '...';
$to       = '...';
$body     = '...';

$message = \Swift_Message::newInstance()
    ->setSubject($subject)
    ->setFrom($from)
    ->setTo($to)
    ->setBody($body, 'text/html')
;

//  Put e-mail in spool
$result = $mailer->send($message);

//  Flush spool queue
$transport      = $mailer->getTransport();  
$spool          = $transport->getSpool();
$realTransport  = $this->container->get('swiftmailer.transport.real')
$spool->flushQueue($realTransport);

By

//  Custom mailer
$mailerServiceName  = 'myCustomMailer';
$customMailer       = $this->container->get("swiftmailer.mailer.".$mailerServiceName);

$subject  = '...';
$from     = '...';
$to       = '...';
$body     = '...';

$message = \Swift_Message::newInstance()
    ->setSubject($subject)
    ->setFrom($from)
    ->setTo($to)
    ->setBody($body, 'text/html')
;

//  Put e-mail in spool
$result = $customMailer->send($message);

//  Flush spool queue
$transport      = $customMailer->getTransport();  
$spool          = $transport->getSpool();
$realTransport  = $this->container->get('swiftmailer.mailer.'.$mailerServiceName.'.transport.real');
$spool->flushQueue($realTransport);