如何检查Cpanel中的端口465是否关闭

Question

我的新托管公司有问题。我无法通过端口465发送电子邮件。正如您所知，端口465用于安全SMTP服务，如果关闭，用户将无法从外部电子邮件帐户（如Yahoo！或Gmail。例如，当我试图通过PHPMailer发送电子邮件时，我收到了以下错误：

Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

现在我的问题是如何检查Cpanel中的端口465是否关闭？我使用http://portquiz.net/网站，并显示端口465被阻止。什么是最简单的方法来证明托管公司他们封锁了465端口。谢谢

Answer 1

如果您的服务提供商使用CSF防火墙，则默认情况下始终处于阻止状态，因此您应联系服务提供商以从阻止列表中删除。

您可以使用下面的php脚本扫描所有邮件端口。

<?php
$ports[] = array('host'=>'interspire.smtp.com','number'=>25);
$ports[] = array('host'=>'interspire.smtp.com','number'=>2525);
$ports[] = array('host'=>'interspire.smtp.com','number'=>25025);
$ports[] = array('host'=>'helpme.interspire.smtp.com','number'=>80);
$ports[] = array('host'=>'google.com','number'=>80);
$ports[] = array('host'=>'smtp.gmail.com','number'=>587);
$ports[] = array('host'=>'smtp.gmail.com','number'=>465);
$ports[] = array('host'=>'pop.gmail.com','number'=>995);
$ports[] = array('host'=>'imap.gmail.com','number'=>993);
$ports[] = array('host'=>'ftp.mozilla.org','number'=>21);
$ports[] = array('host'=>'smtp2go.com','number'=>8025);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>25);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>26);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>940);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>8001);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>2525);
$ports[] = array('host'=>'relay.dnsexit.com','number'=>80);
$ports[] = array('host'=>'mail.authsmtp.com','number'=>23);
$ports[] = array('host'=>'mail.authsmtp.com','number'=>25);
$ports[] = array('host'=>'mail.authsmtp.com','number'=>26);
$ports[] = array('host'=>'mail.authsmtp.com','number'=>2525);
foreach ($ports as $port)
{
    //$connection = @fsockopen($port['host'], $port['number']);
    $connection = @fsockopen($port['host'], $port['number'], $errno, $errstr, 5); // 5 second timeout for each port.
    if (is_resource($connection))
    {
        echo '<h2>' . $port['host'] . ':' . $port['number'] . ' ' . '(' . getservbyport($port, 'tcp') . ') is open.</h2>' . "n";
        fclose($connection);
    }
    else
    {
        echo '<h2>' . $port['host'] . ':' . $port['number'] . ' is not responding.</h2>' . "n";
    }
}

?>

由interwire 编写的代码

Answer 2

要检查您的Cpanel服务器上是否有端口被防火墙关闭，请尝试以下操作：

iptables -L -n |grep [PORT]
# For your question 
iptables -L -n |grep 465

端口465 SMTP 无效