如何使用javax.mail设置或更改SMTP消息ID？ [英] How do I set or change the SMTP Message-ID with javax.mail?

问题描述

如何在使用 javax.mail 发送邮件时设置SMTP邮件ID。我的邮件服务器报告的内容如下：

How can I set the SMTP message-id while sending mails with javax.mail. My mail server is reporting something like this:

1 <= [e-mail] H=mail (host) [192.168.1.4] P=esmtp S=142014
     id=[e-mail]
2 => sombodey@else R=dnslookup T=remote_smtp H=mx00.t-online.de [194.25.134.8]
3 Completed

我想在发送之前设置 id = [e-mail] 。这可能吗？它创建的电子邮件如下：

I want to set the id=[e-mail] before sending it. Is this possible? The email it created like this:

Properties props = System.getProperties();
props.put("mail.smtp.host", "192.168.1.4");
Session session = Session.getDefaultInstance(props, null);
session.setDebug(false);
Message msg = createMsg();
Transport.send(msg);

推荐答案

我相信 JavaMail FAQ 回答你的问题：

问：我为新邮件的Message-ID标头设置了一个特定值，但是当我发送此邮件时，标头会被重写。

Q: I set a particular value for the Message-ID header of my new message, but when I send this message that header is rewritten.

A：调用saveChanges方法时设置Message-ID字段的新值（通常在消息为
发送时隐式） ，覆盖你自己设定的任何价值。如果您需要设置
自己的Message-ID并保留它，则必须创建自己的
MimeMessage子类，覆盖updateMessageID方法并使用此子类的
实例。 / p>

A: A new value for the Message-ID field is set when the saveChanges method is called (usually implicitly when a message is sent), overwriting any value you set yourself. If you need to set your own Message-ID and have it retained, you will have to create your own MimeMessage subclass, override the updateMessageID method and use an instance of this subclass.

class MyMessage extends MimeMessage {
    ...

    protected void updateMessageID() throws MessagingException {
  setHeader("Message-ID", "my-message-id");
    }
    ...
}

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