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What sort of speed should I expect from using Zend_Mail_Transport_Smtp with Gmail?

by Andrew Havens :: Rate this Message:

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I have a script that sends an email out to a list of subscribers, but
it runs _really_ slow, especially for how few subscribers I am testing
against. Within the foreach loop, it takes about 3-5 seconds per
email.

My code looks something like this:

$config = array('ssl' => 'tls', 'port' => 587, 'auth' => 'login',
'username' => 'username', 'password' => 'password');
$smtpConnection = new Zend_Mail_Transport_Smtp('smtp.gmail.com', $config);
Zend_Mail::setDefaultTransport($smtpConnection);

$attachment = new Zend_Mime_Part(file_get_contents($filepath));
$attachment->type = 'application/pdf';
$attachment->disposition = Zend_Mime::DISPOSITION_ATTACHMENT;
$attachment->encoding = Zend_Mime::ENCODING_BASE64;
$attachment->filename = $filename;

foreach ($subscribers as $subscriber) {
    $message = new Zend_Mail('utf-8');
    $message->setFrom('email@...', 'From Name')
        ->addTo($subscriber->email)
        ->setSubject($subject)
        ->setBodyText($body);
    $message->addAttachment($attachment);
    $message->send();
}

Is there something that I should be doing differently?

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