My System:
- Operating System: Linux VServer
 - Webserver: apache2 Mailserver (Using IMAP): Dovecot
 - MTA (MailTransportAgent): Postfix + postfix.admin(webapp) to administrate
 - my Domain: acegames.de (137.74.140.78)
 - TLS-Mail-encryption via port 465 is working
 
What i want to do:
Execute (Button on website->javascript->ajax->php) php script mail_send.php (+ query) to send mail with swiftmail functions. Swiftmail should use my postfix SMTP-Server to send the mail. The swiftmail files are located in /var/www/html/ts/swiftmailer/.
this is http://ts.acegames.de/mail_send.php or /var/www/html/ts/mail_send.php:
<?php 
require_once 'swiftmailer/lib/swift_required.php';
$error = $_GET['err']; $time = $_GET['time']; $user = $_GET['user'];
$transport = Swift_SmtpTransport::newInstance('acegames.de', 465);
$transport->setUsername("[email protected]");
$transport->setPassword("PASS");
$mailer = Swift_Mailer::newInstance($transport);
$message = Swift_Message::newInstance('Teamspeak Error Report');
$message->setFrom(array('[email protected]' => 'USER'));
$message->setTo(array('[email protected]' => 'ts3 report'));
$message->setBody(
'<html>' . 
' <head></head>' . 
' <body>' . 
' <p>Reported Error: ' . $error . '</p>' . 
'  <p>Time: ' . $time . '</p>' . 
'  <p>User: ' . $user . '</p>' . 
' </body>' . 
'</html>', 'text/html' );
// Send the email 
$result = $mailer->send($message); 
?>
But what i get is a 500-INTERNAL_SERVER_ERROR and the following log: /var/log/apache2/error.log:
[:error] [pid 23732] [client 188.174.41.220:49670] PHP Fatal error:   Uncaught exception 'Swift_TransportException' with message 'Connection
to acegames.de:465 Timed Out'  in
/var/www/html/ts/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:404\nStack
trace:\n#0 
/var/www/html/ts/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(289):
Swift_Transport_AbstractSmtpTransport->_getFullResponse(0)\n#1 
/var/www/html/ts/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(117):
Swift_Transport_AbstractSmtpTransport->_readGreeting()\n#2 
/var/www/html/ts/swiftmailer/lib/classes/Swift/Mailer.php(79):
Swift_Transport_AbstractSmtpTransport->start()\n#3 
/var/www/html/ts/mail_send.php(36):
Swift_Mailer->send(Object(Swift_Message))\n#4 {main}\n  thrown in 
/var/www/html/ts/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php
on line 404, referer: https://ts.acegames.de/
I dont know what the issue is. Ive searched through every logfile (mail.log,syslog,apache2 logs,...) but i havent found anything related to this error.
                        
More Infos requested by @hokusai:
telnet acegames.de 465 Trying 137.74.140.78... Connected to acegames.de. Escape character is '^]'. ... Connection closed by foreign host.
telnet acegames.de 443 Trying 137.74.140.78... Connected to acegames.de. Escape character is '^]'. ... Connection closed by foreign host.
telnet acegames.de 80 Trying 137.74.140.78... Connected to acegames.de. Escape character is '^]'. 301 Moved Permanently
Moved Permanently
The document has moved here.
Apache/2.4.10 (Debian) Server at acegames.de Port 80 ... Connection closed by foreign host.