这是我的代码：

require 'PHPMailerAutoload.PHP';
$config = parse_ini_file('/path/to/file/config.ini',true);
$mail = new PHPMailer;
$mail->SMTPDebug = 3;
$mail->Debugoutput = 'html';
$mail->isSMTP();
$mail->Host = $config['host']; //smtp.office365.com
$mail->SMTPAuth = true;
$mail->Username = $config['username']; //an.existing.account@appinc.co
$mail->Password = $config['password']; //confirmed this is being passed correctly
$mail->SMTPSecure = 'tls';
$mail->Port = 587;
$mail->From = $config['username'];
$mail->FromName = 'Website Forms';
$mail->addAddress('sales@appinc.co','Some Name');
$mail->addReplyTo('sender.email@somedomain.com','SenderFirst SenderLast');
$mail->addBCC('my.email.address@appinc.co');
$mail->isHTML(true);
$mail->Subject = 'Contact Form Submission';
$mail->Body = 'Some html here';
$mail->AltBody = 'Some alt content here';
if(!$mail->send()) {
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    //perform success actions
    exit();
}

我已经确认域名,用户名和密码都是正确的并正确传递.需要注意的是,这在启动之前在我们的本地开发服务器上有效.一旦网站被移动到我们的托管帐户(Hostgator),它就会停止工作.我已经向HG确认我们的服务器上已打开587端口.

这是我看到的错误消息：

Connection: opening to smtp.office365.com:587,t=10,opt=array ()
SMTP ERROR: Failed to connect to server: Connection refused (111)
SMTP connect() Failed.
Message could not be sent.Mailer Error: SMTP connect() Failed.

我们非常感谢任何可以提供的帮助,即使它只是一篇文章的链接,它解释了为什么它现在无法在我们的生产环境中运行.