phpmailer发送邮件无需SMTP认证

Question

我正在使用 Phpmailer 发送电子邮件。最初，当我通过用户名和密码使用 SMTP 时，它工作正常。如果我尝试不进行 SMTP 身份验证，则会返回连接超时错误。这是我的代码

<?php
require 'PHPMailerAutoload.php';

$mail = new PHPMailer;
$mail->isSMTP();
$mail->SMTPDebug = 2;
$mail->Debugoutput = 'html';
$mail->Host = "relay-hosting.secureserver.net";
$mail->Port = 25;
$mail->SMTPAuth = false;
$mail->SMTPSecure = false;
$mail->setFrom('xxxx@domainname.com', 'First Last');
$mail->addAddress("xxxx@domainname.com", "Recepient Name");
$mail->addReplyTo("xxxx@domainname.com", "Reply");
$mail->isHTML(true);

$mail->Subject = "Subject Text";
$mail->Body = "<i>Mail body in HTML</i>";
$mail->AltBody = "This is the plain text version of the email content";

if(!$mail->send()) 
{
    echo "Mailer Error: " . $mail->ErrorInfo;
} 
else 
{
    echo "Message has been sent successfully";
}

?>

返回的错误是

SMTP 错误：无法连接到服务器：连接超时 (110)

mail.log 文件包含

host smtp.secureserver.net[68.178.213.203] refused to talk to
me: 554 p3plibsmtp03-06.prod.phx3.secureserver.net bizsmtp
IB105. Connection refused. <ip address> is listed on the
Exploits Block List (XBL)<http://www.spamhaus.org/query/ip/ip
address> Please visit http://www.spamhaus.org/xbl/ for
more information.

Answer 1

检查您的 IP 是否列在 spamhaus 黑名单删除中心上。

https://www.spamhaus.org/query/ip/your-ip-address

如果已列出，则按照其程序取消列出它们。这需要一些时间。从代码中删除 SMTP 配置。

<?php
require 'PHPMailerAutoload.php';

$mail = new PHPMailer;
$mail->setFrom('xxxx@domainname.com', 'First Last');
$mail->addAddress("xxxx@domainname.com", "Recepient Name");
$mail->addReplyTo("xxxx@domainname.com", "Reply");
$mail->isHTML(true);

$mail->Subject = "Subject Text";
$mail->Body = "<i>Mail body in HTML</i>";
$mail->AltBody = "This is the plain text version of the email content";

if(!$mail->send()) 
{
    echo "Mailer Error: " . $mail->ErrorInfo;
} 
else 
{
    echo "Message has been sent successfully";
}

?>

这个对我有用。