Here is my code:
<?php
require_once 'Swift/lib/swift_required.php';
$transport = Swift_SmtpTransport::newInstance('smtp.gmail.com', 465)
->setUsername('me@ff.com')
->setPassword('pass');
$mailer = Swift_Mailer::newInstance($transport);
$message = Swift_Message::newInstance('Wonderful Subject')
->setFrom(array('me@ff.com' => 'MY NAME'))
->setTo(array('you@ss.com' => 'YOU'))
->setBody('This is the text of the mail send by Swift using SMTP transport.');
//$attachment = Swift_Attachment::newInstance(file_get_contents('path/logo.png'), 'logo.png');
//$message->attach($attachment);
$numSent = $mailer->send($message);
printf("Sent %d messages\n", $numSent);
?>
AFter RUNNING GOT THIS ERROR...
Fatal error: Uncaught exception 'Swift_TransportException' with message 'Expected response code 220 but got code "", with message ""' in /home/sitenyou/public_html/Swift/lib/classes/Swift/Transport/AbstractSmtpTransport.php:406
Stack trace:
#0 /home/sitenyou/public_html/Swift/lib/classes/Swift/Transport/AbstractSmtpTransport.php(299): Swift_Transport_AbstractSmtpTransport->_assertResponseCode('', Array)
#1 /home/sitenyou/public_html/Swift/lib/classes/Swift/Transport/AbstractSmtpTransport.php(107): Swift_Transport_AbstractSmtpTransport->_readGreeting()
#2 /home/sitenyou/public_html/Swift/lib/classes/Swift/Mailer.php(74): Swift_Transport_AbstractSmtpTransport->start()
#3 /home/sitenyou/public_html/sgmail.php(16): Swift_Mailer->send(Object(Swift_Message))
#4 {main} thrown in /home/sitenyou/public_html/Swift/lib/classes/Swift/Transport/AbstractSmtpTransport.php on line 406
Swift SmtpTransport - Code (send a email)
The SMTP of GMAIL is: smtp.googlemail.com
The Full Code:
For google apps, in addition to setting to port 465 and ssl as recommended in the accepted answer, you may have to enable allow less secure apps setting, as per https://stackoverflow.com/a/25238515/947370