为什么 SMTP 错误：无法连接到服务器：尝试使用 PhpMailer 发送电子邮件时没有到主机的路由 (65)？

Question

I am attempting to use PhpMailer to send an email of an MP3 to a user. When I try to send an email to the user I get a message saying: SMTP ERROR: Failed to connect to server: No route to host (65) . I have read this might be the result of gmail not agreeing with a different server but I don't see any remedy. I switched from tls to ssl and that didn't help. I also tried 3 different physical locations and the problem still persists. This worked fine initially and maybe something switched off but I don't know what. UPDATE I am having this problem only on my hosted site . localhost is working now. Is there some necessary configuration on my shared server I am missing? Any ideas would be greatly appreciated.

<?php
session_start();
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

date_default_timezone_set('America/New_York');

require_once 'vendor/autoload.php';

$m = new PHPMailer(true);


try{
$m->SMTPDebug = 2;
$m->isSMTP();
$m->Host = 'smtp.gmail.com';
$m->SMTPAuth = true;


$m->Username = 'munsonatl@gmail.com';
$m->Password = 'somethingsecret';


$m->SMTPSecure = 'ssl';
$m->Port = 465;

$m->setFrom('munsonatl@gmail.com', 'Mailer');
$m->addAddress('munsonatl@gmail.com', 'Matt Macy');
$m->addReplyto('reply@mattmacy.com', 'replyAddress');


require 'connect.php';

$itemNum = $_SESSION['itemNum'];


$query2 = "SELECT* FROM MP3s_For_Sale WHERE itemNum = :itemNum";
$LastProduct = $db->prepare($query2);
$LastProduct->bindvalue(':itemNum', $itemNum);
$LastProduct->execute();

$rows = $LastProduct->fetch();

$filename = $rows['path'];
$filesize = $rows['filesize'];
$string =  $rows['wholeMP3'];
$encoding = 'base64';
$type = $rows['type']; 

$m->AddStringAttachment($string,$filename,$encoding,$type);

$m->isHTML(true);

$m->Subject = "Here is an Email";
$m->Body = "<p>This is the body of the email</p><br><strong>Test for 
HTML formatting</strong><br>";
$m->AltBody = "This is the body of an email";
$m->send();
echo "message has been sent";

unset($_SESSION['itemNum']);

} catch (Exception $e){
echo "message could not be sent", $m->ErrorInfo;
}

?>

Answer 1

I don't have the reputation to leave a comment like the others did, but I have had this issue before caused by the port being blocked on shared hosting. If you need to check if yours is blocked, then look at PHP Checking if a port is Active

Answer 2

After talking with my hosting company for the third time they said web.com does not require the use of ports or even SMTP to work with PhpMailer. I commented out everything that has to do with Ports or SMTP and as a result it now works kind of. I haven't been able to send email to my secondary email account at all and it works only most of the time with my gmail account. If someone can tell me anything else about web.com and what is going on it would be very helpful.