PHPMailer - 标记为垃圾邮件的电子邮件

Question

我目前在使用某些电子邮件域时遇到了一些问题。实际上，当我向这些域发送消息时，我会收到这条消息：

The original message was received at Thu, 12 Feb 2015 10:34:27 +0100 from smtp3.infomaniak.ch [84.16.68.91]

   ----- The following addresses had permanent fatal errors ----- <person_i_want_to_contact@domaine_name.com>
    (reason: 550-ATLAS(2503): Your email was detected as spam. (RCPTs:)

   ----- Transcript of session follows ----- ... while talking to mx0.123-reg.co.uk.:
>>> DATA
<<< 550-ATLAS(2503): Your email was detected as spam. (RCPTs:
<<< 550 person_i_want_to_contact@domaine_name.com)
554 5.0.0 Service unavailable

几天来我一直在努力寻找解决方案，但我开始放弃了……我的 PHPMailer 代码如下所示：

function sendmail4d ( ) {
    $mail = new PHPMailer;
    $mail->isSMTP();
    $mail->setLanguage('../fr','/language/');
    $mail->Host = 'mail.infomaniak.ch';
    $mail->Hostname = 'interpretercalendars.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'username_example@interpretercalendars.com';
    $mail->Password = 'password_example';
    $mail->SMTPSecure = 'tls';
    $mail->Port = 587;
    $mail->Port = 587;
    $mail->Sender = 'no-reply@interpretercalendars.com';
    $mail->From = 'no-reply@interpretercalendars.com';
    $mail->FromName = 'Interpreter Calendars';
    $mail->addReplyTo('no-reply@interpretercalendars.com','Interpreter Calendars');
    $mail->addAddress('person_i_want_to_contact@domaine_name.com');
    $mail->isHTML(true);
    $mail->Subject = 'Interpreter Calendars - Validate your account';
    $mail->Body    = 'Hi,<br /><br /><br />Welcome to Interpreter Calendars. To activate your account and start using Interpreter Calendars, please click on the link bellow :<br /><br /><a href="http://interpretercalendars.com">http://interpretercalendars.com</a><br /><br />If your click on the above link doesn\'t work, please copy and paste the entire link into your web browser.<br /><br />We are happy you chose Interpreter Calendars. With best regards<br /><br />The Interpreter Calendars team<br /><br /><br /><br />This is a computer-generated e-mail. Please, do not answer to this message. If you need to contact us, please write your message to info@interpretercalendars.com<br /><br />';
        $mail->AltBody = strip_tags('Hi,<br /><br /><br />Welcome to Interpreter Calendars. To activate your account and start using Interpreter Calendars, please click on the link bellow :<br /><br /><a href="http://interpretercalendars.com">http://interpretercalendars.com</a><br /><br />If your click on the above link doesn\'t work, please copy and paste the entire link into your web browser.<br /><br />We are happy you chose Interpreter Calendars. With best regards<br /><br />The Interpreter Calendars team<br /><br /><br /><br />This is a computer-generated e-mail. Please, do not answer to this message. If you need to contact us, please write your message to info@interpretercalendars.com<br /><br />');

    if(!$mail->send()) {
        return $mail->ErrorInfo;
    } else {
        return 0;
    }

}

实际上，根据域的不同，一切都可以完美运行。但是在前面的例子中，电子邮件总是被视为垃圾邮件......有没有办法解决这个问题？ （反向 DNS 似乎很好，我尝试了许多不同的标头，但也没有工作......）

谢谢你和亲切的问候

提达斯

Answer 1

123-reg.co.uk 是一个非常糟糕的服务，它会将查看您主题中的文本的垃圾邮件标记/拒绝，并且这些条件非常严格，主题文本中没有名称/电子邮件地址/数字/长文本。

使用 123-reg.co.uk 作为 SMTP 提供商的用户很可能会在某个时候到达：

SMTP Error: Mailcore(2503): Your email was detected as spam. SA (RCPTs: ...)SMTP code: 550

我尝试使用 google SMTP 发送相同的电子邮件，完全没有问题。

Answer 2

要查看您的设置是否存在会导致其他邮件服务器认为它是垃圾邮件发送者的明显问题，请尝试从您的邮件服务器向 check-auth@verifier.port25.com 发送消息。该服务将进行大量检查，您将收到包含大量信息的报告，例如您的邮件服务器的 DNS 是否设置正确，您的邮件服务器的 IP 是否在任何黑名单上，如果您有问题与您的 SPF 记录等。

Answer 3

您的内容类型和 MIME 标头丢失。而且我听说你应该实现发送邮件的 PHP 版本，如果没有设置这些标头，有时它会被标记为垃圾邮件。