Executing email sending php script with cron - php

Question

I have a php script that sends an email with an attachment. When I manually execute the php script below via a web browser, everything works well and the email is sent instantly. However, when I try to execute the php file using a crontab command, the email is not sent. Any idea why this is? The cron command isn't generating any errors...
Further, the email_output.log shows success but the email doesn't come through, as if it is piling up in the outgoing box but never actually sent.
Crontab command:
/Applications/MAMP/bin/php/php5.6.10/bin/php /my/path/emailApp.php > /my/path/email_console.log 2> /my/path/email_error.log
Thanks in advance.
<?php
include_once(__DIR__ . '/mailer/swift_required.php');
$transport = Swift_SmtpTransport::newInstance('mail.myhost.com', 25)
->setUsername('name#myhost.com')
->setPassword('password');
// Create the Mailer using your created Transport
$mailer = Swift_Mailer::newInstance($transport);
$mailTo = Array('testemail#gmail.com');
$subject ="report";
$attach = 'report.pdf';
$message = Swift_Message::newInstance($subject)
->setFrom(array('name#mydomain.com' => 'Bob Dole' ))
->attach(Swift_Attachment::fromPath($attach)->setFilename($attach))
->setTo($mailTo);
$message->setBody("attached",'text/html');
// Send the message
$result = $mailer->send($message);
if($result == 0){
echo 'Error';
} else {
echo 'Success';
}