PHP电子邮件脚本适用于一台服务器但不适用于另一台服

Question

I have made a website in php for a friend and had hosted it on my server. The email code (with smtp and authentication) i had used worked perfectly on my server. However, he bought a hosting package on register.com to upload the site to. As soon as i uploaded the email script, it no longer worked. Wondered if anyone had any ideas... I replaced the personal details in the code with *'s and yes they are filled out in the actual code.

//new function  


$from = "**@**.com";
$namefrom = "***";  
$subject = "****";  
$message =  "*****";
authSendEmail($from, $namefrom, $to, $nameto, $subject, $message);  

/* * * * * * * * * * * * * * SEND EMAIL FUNCTIONS * * * * * * * * * * * * * */   

//This will send an email using auth smtp and output a log array  
//logArray - connection,   

function authSendEmail($from, $namefrom, $to, $nameto, $subject, $message)  
{  
//SMTP + SERVER DETAILS  
/* * * * CONFIGURATION START * * * */ 
$smtpServer = "*****";
$port = "25";  
$timeout = "30";  
$username = "*****";
$password = "*****"; 
$localhost = "*****";
$newLine = "
";  
/* * * * CONFIGURATION END * * * * */ 

//Connect to the host on the specified port  
$smtpConnect = fsockopen($smtpServer, $port, $errno, $errstr, $timeout);  
$smtpResponse = fgets($smtpConnect, 515);  
if(empty($smtpConnect))   
{  
$output = "Failed to connect: $smtpResponse";  
return $output;  
}  
else 
{  
$logArray['connection'] = "Connected: $smtpResponse";  
}  

//Request Auth Login  
fputs($smtpConnect,"AUTH LOGIN" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authrequest'] = "$smtpResponse";  

//Send username  
fputs($smtpConnect, base64_encode($username) . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authusername'] = "$smtpResponse";  

//Send password  
fputs($smtpConnect, base64_encode($password) . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['authpassword'] = "$smtpResponse";  

//Say Hello to SMTP  
fputs($smtpConnect, "HELO $localhost" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['heloresponse'] = "$smtpResponse";  

//Email From  
fputs($smtpConnect, "MAIL FROM: $from" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['mailfromresponse'] = "$smtpResponse";  

//Email To  
fputs($smtpConnect, "RCPT TO: $to" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['mailtoresponse'] = "$smtpResponse";  

//The Email  
fputs($smtpConnect, "DATA" . $newLine);  
$smtpResponse = fgets($smtpConnect, 515);  
$logArray['data1response'] = "$smtpResponse";  

//Construct Headers  
$headers = "MIME-Version: 1.0" . $newLine;  
$headers .= "Content-type: text/html; charset=iso-8859-1" . $newLine;  
$headers .= "To: $nameto <$to>" . $newLine;  
$headers .= "From: $namefrom <$from>" . $newLine;  

fputs($smtpConnect, "To: $to
From: $from
Subject:    subject
$headers

$message
.
");  

}