[使用mailgun smtp的php邮件被gmail阻止；错误RFC 5322

Question

我收到最近24小时内从gmail服务器启动的以下间歇性错误（发送至gsuite帐户或gmail帐户时）。并非所有消息都发生这种情况。甚至同一条消息也失败一次，然后再工作。我正在寻找一种解决此问题的方法。我不确定这是标题还是gmail错误。

我有专用的mailgun IP，除了gmail之外没有其他错误。

这是错误：

5.7.1 [69.72.33.194 11] Our system has detected that this message is 5.7.1 not RFC 5322 compliant: 5.7.1 'From' header is missing. 5.7.1 To reduce the amount of spam sent to Gmail, this message has been 5.7.1 blocked. Please visit 5.7.1 https://support.google.com/mail/?p=RfcMessageNonCompliant 5.7.1 and review RFC 5322 specifications for more information. p18si54042ood.13 - gsmtp

发送电子邮件的代码：（使用mailgun通过后缀）

$lead_email = BCC_EMAIL;
$cc_email = LEAD_CC_NOTIFICATION_EMAIL;

$message = <<<MSG
    <p>Hi PHP POS Admin,</p>
    <p>You have received a TRIAL CONVERSION from the customer below: </p>

    <ul>
    <li>Company: $data[company]</li>
    <li>Name: $data[name]</li>
    <li>E-Mail: $data[email]</li>
    <li>Phone: $data[phone]</li>
    <li>Provider: $data[payment_provider]</li>
    <li>Address: <strong>$data[country]</strong> $data[address_1] $data[address_2] $data[city] $data[state], $data[zip]</li>
    <li>IP Address: $data[ip_address]</li>
    <li>IP Address Location: $data[ip_geo]</li>
    </ul>

    Regards<br>
    </p>
MSG;

    $from = $lead_email;
    $subject = 'SUBJECT';
    $headers = 'MIME-Version: 1.0' . "\r\n";
    $headers .= "From: ".$from . "\r\n";

    $headers .= 'Content-type: text/html; charset=UTF-8' . "\r\n";
    mail($lead_email, $subject, $message, $headers);

原始MIME：

Received: by REDACTED (Postfix, from userid 48)
    id 91F58812D2; Tue, 19 May 2020 17:51:59 +0000 (UTC)
To: REDACTED
Subject: REDACTED
X-PHP-Originating-Script: 500: REDACTED
MIME-Version: 1.0
From: [email protected]
Content-type: text/html; charset=UTF-8
Message-Id: < REDACTED >
Date: Tue, 19 May 2020 17:51:59 +0000 (UTC)

    <p>Hi PHP POS Admin,</p>
    <p>You have received a TRIAL CONVERSION from the customer below: </p>

    <ul>
    <li>Company: REDACTED</li>
    <li>Name: REDACTED </li>
    <li>E-Mail: REDACTED </li>
    <li>Phone: REDACTED </li>
    <li>Provider: braintree</li>
    <li>Address: <strong> REDACTED </strong>    , REDACTED </li>
    <li>IP Address: REDACTED </li>
    <li>IP Address Location: , , </li>
    </ul>

    Regards,<br>
    PHP Point Of Sale Team
    </p>

Answer 1

我最终使用phpmailer，因为它管理所有标头。到目前为止，它一直有效