SMTP错误:EHLO命令失败:-ERR未知命令

Question

我正试图使用以下PHP代码发送电子邮件：

require("PHPMailer-master/src/PHPMailer.php");
require("PHPMailer-master/src/SMTP.php");
require("PHPMailer-master/src/Exception.php");
$from  = "[e-mail]";
$namefrom = "admin";
$mail = new PHPMailerPHPMailerPHPMailer();
$mail->isSMTP();   // by SMTP
$mail->SMTPDebug = 1;
$mail->SMTPAuth   = true;   // user and password
$mail->Host       = "mail.gandi.net";
$mail->Port       = 110;
$mail->Username   = $from;
$mail->Password   = "Password123";
$mail->CharSet = 'UTF-8';
//        $mail->SMTPSecure = "";    // options: 'ssl', 'tls' , ''  
$mail->setFrom($from,$namefrom);   // From (origin)
$mail->addCC($from,$namefrom);      // There is also addBCC
$mail->Subject  = "Some subject";
$mail->AltBody  = "Altenrate";
$mail->Body = "Heyheyhey";
$mail->isHTML(false);   // Set HTML type
$mail->addAddress("[e-mail]", "[e-mail]");
if($mail->send())
{
echo "ok sent";
}
else
{
echo "Mailer Error: " . $mail->ErrorInfo;
}
}

问题是，当使用这个代码时，它需要很长时间才能加载，并最终向我显示这个错误：

2018-12-09 20:50:24 CLIENT -> SERVER: EHLO www.mydomain.be
2018-12-09 20:53:24 SMTP ERROR: EHLO command failed: -ERR Unknown command.-ERR Disconnected for inactivity.
2018-12-09 20:53:24 SMTP NOTICE: EOF caught while checking if connected
SMTP Error: Could not authenticate.
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

有人能解释一下问题是什么以及如何解决吗？

谢谢！

Answer 1

您的设置错误，根据：https://docs.gandi.net/en/gandimail/standard_email_settings/index.html

应该是

Outgoing (SMTP) server name: mail.gandi.net
Port: 25, 465 (with SSL) or 587 (with STARTTLS)
TLS or SSL: yes
SMTP Authentication: yes, using the same settings as for the POP / IMAP account

Answer 2

你好，traducerad，

$mail->isSMTP();   // by SMTP
$mail->SMTPDebug = 1;
$mail->SMTPAuth   = true;   // user and password
$mail->Host       = "mail.gandi.net";
$mail->Port       = 110;
$mail->Username   = $from;
$mail->Password   = "Password123";
// $mail->SMTPSecure = "";

端口110用于传入POP通信
我想你想通过SMTP发送一封电子邮件。

传出(SMTP(服务器名称：mail.gandi.net
端口：25465(带SSL(或587(带STARTTLS(
TLS或SSL:是
SMTP身份验证：是，使用与POP/IMAP帐户相同的设置

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