SMTP connection works on localhost but not on server

<?php
require("smtp.php");
require("sasl/sasl.php");


$from="abc@gmail.com"; $sender_line=__LINE__;
$to="xyz@gmail.com"; $recipient_line=__LINE__;

if(strlen($from)==0)
die("Please set the messages sender address in line ".$sender_line." of the script ".basename(__FILE__)."\n");
if(strlen($to)==0)
die("Please set the messages recipient address in line ".$recipient_line." of the script ".basename(__FILE__)."\n");

$smtp=new smtp_class;

$smtp->host_name="smtp.gmail.com";
$smtp->host_port=465;
$smtp->ssl=1;

$smtp->http_proxy_host_name='';
$smtp->http_proxy_host_port=3128;

$smtp->socks_host_name = '';
$smtp->socks_host_port = 1080;
$smtp->socks_version = '5';

$smtp->start_tls=0;
$smtp->localhost="localhost";
$smtp->direct_delivery=0;
$smtp->timeout=30;
$smtp->data_timeout=0;
$smtp->debug=1;
$smtp->html_debug=1;
$smtp->pop3_auth_host="";
$smtp->user="abc@gmail.com";
$smtp->realm="";
$smtp->password="xxxxxxxxxx";
$smtp->workstation="";

$smtp->authentication_mechanism="";

if($smtp->direct_delivery)
{
if(!function_exists("GetMXRR"))
{
$_NAMESERVERS=array();
include("getmxrr.php");
}
}

if($smtp->SendMessage(
$from,
array(
$to
),
array(
"From: $from",
"To: $to",
"Subject: Testing Manuel Lemos' SMTP class",
"Date: ".strftime("%a, %d %b %Y %H:%M:%S %Z")
),
"Hello $to,\n\nIt is just to let you know that your SMTP class is working just fine.\n\nBye.\n"))
echo "Message sent to $to OK.\n";
else
echo "Could not send the message to $to.\nError: ".$smtp->error."\n";
?>


This code works fine when I send mail from my local computer (XAMPP) but when I upload it to my domain, connection just times out and program haults.

Where am I doing it wrong?

Very likely your hosting company is blocking socket connections to external servers. Just ask them to confirm if that is the case.

Hello
I have a same problem.
Error: could not connect to the host "send.one.com": Connection timed out
Technical team opened port 465 on the remote server but the timeout problem still exists...
Is it necessary that other ports are open on remote host?Such as 1080 or 3128?
Thanks for your help

No, if they opened the port 465, you just need to change your code to use that port.

Other ports like 1080 or 3128 seem to be for proxies. If you use port 465 you do not need to use proxies.

Port 465 is open, but debug mode return timeout!
I really do not know what should I do?
I even closed the port 465 on localhost but smtpclass work correctly!!!
I think the problem is not 465 port.Because its open on my remote host.
can you check attach files(4files) if send to you?
these files work correctly on localhost!
my English is not good sir,Sorry!

Maybe the timeout is too short and the remote server is taking too long.

Can you please enabled debugging and show the debug log output?

sure
Resolving SMTP server domain "send.one.com"...
Connecting to SMTP server "send.one.com" port 465...
Error: could not connect to the host "send.one.com": Connection timed out
$timeout=30;
and i checked it on 3 different remote servers with reasonable speed

It does not seem that the port is really opened. I would double check that with your system administrator.

If you can go on the shell (maybe via ssh) of that server and try this command, you can be sure whether the port is blocked or not:

telnet send.one.com 465

thank you Mr Lemos