使用JS调用EWS在Outlook中发邮件时附件丢失及邮件入垃圾箱问题求解

你的代码存在三处核心错误导致附件无法正常携带：

• SOAP请求结构不合法：不允许在单次SOAP请求的Body节点中同时包含CreateItem和CreateAttachment两个操作，Exchange会直接忽略第二个操作的内容
• 自定义ItemId无效：你手动填写的ItemId Id="123"是无效的虚拟ID，无法关联到实际生成的邮件草稿
• 操作顺序错误：发送带附件的邮件需要遵循三步流程：先创建草稿邮件获取真实ID→用真实ID上传附件→最后发送邮件

你可以按照如下逻辑修改代码：

function send_mail(msg) {
  // 第一步：创建草稿邮件，仅保存不发送
  const createDraftRequest = `<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    <soap:Header><t:RequestServerVersion Version="Exchange2010" /></soap:Header>
    <soap:Body>
      <m:CreateItem MessageDisposition="SaveOnly">
        <m:SavedItemFolderId><t:DistinguishedFolderId Id="drafts" /></m:SavedItemFolderId>
        <m:Items>
          <t:Message>
            <t:Subject>${msg.subject}</t:Subject>
            <t:Body BodyType="HTML">${msg.body}</t:Body>
            <t:ToRecipients>
              <t:Mailbox><t:EmailAddress>${msg.To}</t:EmailAddress></t:Mailbox>
            </t:ToRecipients>
          </t:Message>
        </m:Items>
      </m:CreateItem>
    </soap:Body>
  </soap:Envelope>`;

  Office.context.mailbox.makeEwsRequestAsync(createDraftRequest, (draftResult) => {
    if (draftResult.status === "failed") {
      console.log("创建草稿失败：" + draftResult.error.message);
      return;
    }
    // 解析返回的真实草稿ID
    const parser = new DOMParser();
    const xmlDoc = parser.parseFromString(draftResult.value, "text/xml");
    const itemId = xmlDoc.getElementsByTagName("t:ItemId")[0].getAttribute("Id");
    const changeKey = xmlDoc.getElementsByTagName("t:ItemId")[0].getAttribute("ChangeKey");

    // 第二步：上传附件到草稿
    const uploadAttachmentRequest = `<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
      <soap:Header><t:RequestServerVersion Version="Exchange2010" /></soap:Header>
      <soap:Body>
        <m:CreateAttachment>
          <m:ParentItemId Id="${itemId}" ChangeKey="${changeKey}"/>
          <m:Attachments>
            <!-- 普通文件附件使用FileAttachment节点，Content为文件的Base64编码 -->
            <t:FileAttachment>
              <t:Name>测试附件.txt</t:Name>
              <t:Content>aGVsbG8gd29ybGQ=</t:Content>
            </t:FileAttachment>
          </m:Attachments>
        </m:CreateAttachment>
      </soap:Body>
    </soap:Envelope>`;

    Office.context.mailbox.makeEwsRequestAsync(uploadAttachmentRequest, (attachResult) => {
      if (attachResult.status === "failed") {
        console.log("上传附件失败：" + attachResult.error.message);
        return;
      }
      // 第三步：发送带附件的邮件
      const sendRequest = `<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
        <soap:Header><t:RequestServerVersion Version="Exchange2010" /></soap:Header>
        <soap:Body>
          <m:SendItem SaveItemToFolder="true">
            <m:ItemIds>
              <t:ItemId Id="${itemId}" ChangeKey="${changeKey}"/>
            </m:ItemIds>
            <m:SavedItemFolderId>
              <t:DistinguishedFolderId Id="sentitems" />
            </m:SavedItemFolderId>
          </m:SendItem>
        </soap:Body>
      </soap:Envelope>`;

      Office.context.mailbox.makeEwsRequestAsync(sendRequest, (sendResult) => {
        if (sendResult.status === "failed") {
          console.log("发送邮件失败：" + sendResult.error.message);
        } else {
          console.log("带附件的邮件发送成功");
        }
      });
    });
  });
}

你可以从以下几个维度调整，降低被判定为垃圾邮件的概率：

• 发件人域名需配置完整的SPF、DKIM、DMARC解析记录，验证发送权限的合法性
• 邮件正文避免使用大量营销类、诱导类敏感词汇，HTML结构要规范，不要插入过多外部链接、隐藏样式
• 附件不要使用.exe、.bat等可执行后缀，如必须发送可压缩后标注安全说明，附件命名不要包含违规敏感词
• 不要短时间内向大量陌生收件人发送相同内容的邮件，避免触发批量发送垃圾邮件的判定规则

内容的提问来源于stack exchange，提问作者Suyash Srivastava