问题描述
此邮件发件人示例很好运行
This example of mail sender works wellSend Email Multiple Upload Form & Attachment File
但是，问题是每封电子邮件仅发送到yahoo电子邮件，转发到垃圾邮件文件夹。
but, problem is what every email sending ONLY to yahoo emails, forwarding to spam folder.
为什么？如何防止将邮件发送到垃圾邮件文件夹？
Why? How to prevent sending mail to spam folder?
推荐答案
来自DKIM.ORG：
From DKIM.ORG:
DKIM启用了一种机制，该机制允许潜在的电子邮件签名者发布有关其电子邮件签名实践的信息；这将使电子邮件接收者可以对邮件进行其他评估。 DKIM对电子邮件身份的身份验证可以帮助对垃圾邮件和网络钓鱼进行全局控制。
DKIM enables a mechanism that permits potential email signers to publish information about their email signing practices; this will permit email receivers to make additional assessments about messages. DKIM's authentication of email identity can assist in the global control of "spam" and "phishing".
这是Yahoo!的可能性之一。可能会将电子邮件标记为垃圾邮件，因为在发送 DKIM为电子邮件定义域级数字签名身份验证框架时，该邮件未使用DKIM签名进行签名。
Its one of the possibilities that Yahoo! might marked the email as spam because the message is not signed with DKIM signature when is sent "DKIM defines a domain-level digital signature authentication framework for email".
Yahoo！还有另一个标题可能会将它们标记为垃圾邮件。
There are also another headers that Yahoo! might mark them as spam.
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