PHP - SMTP错误10060（SMTP - ＆gt;错误：无法连接到服务器）

Question

我使用SMTP连接发送电子邮件。在它工作正常之前的一个月没有工作。我无法得到该错误的实际原因。

错误是：

SMTP -> ERROR: Failed to connect to server: A connection attempt failed because the 
connected party did not properly respond after a period of time, or established 
connection failed because connected host has failed to respond. (10060)

我的代码是：

$mail->SMTPDebug    = 1;
$mail->SMTPAuth     = true;    // enable SMTP authentication
$mail->SMTPSecure   = "ssl";   // sets the prefix to the servier
$mail->Host         = "smtp.gmail.com";   // sets GMAIL as the SMTP server
$mail->Port         = 465;   // set the SMTP port for the GMAIL server
$mail->Username     = "emailid@gmail.com";// GMAIL username
$mail->Password     = "xxxxxxx";// GMAIL password
$mail->AddAddress("somthing@gmail.com", "Somthing");
$mail->Subject  = "Test Subject";
$mail->AltBody  = 'To view the message, please use an HTML compatible email viewer!'; // optional - MsgHTML will create an alternate automatically
$mail->MsgHTML(utf8_decode("HTML Content"));
$mail->Send();