收消息

使用Cloudflare Worker部署
到电子邮件那里新建worker，再新建地址，选择转发到worker，选中刚刚创建的worker
因Cloudflare限制，必须使用wrangler开发（网页编辑器无法导入包）
使用wrangler创建项目，名字与刚创建的电子邮件worker相同
进入项目并安装postal-mime包
到云湖控制台中新建机器人

在 wrangler.toml 里写入如下变量

[vars]
YH_BOT_TOKEN = "换成你的云湖机器人Token"
YH_USER_ID = "换成你的ID"

然后编写代码：

import PostalMime from "postal-mime";

async function toYunhu(msg, env) {
    const token = env.YH_BOT_TOKEN;
    const apiUrl =
        "https://chat-go.jwzhd.com/open-apis/v1/bot/send?token=" + token;
    const response = await fetch(apiUrl, {
        method: "POST",
        headers: { "Content-Type": "application/json; charset=utf-8" },
        body: JSON.stringify({
            recvId: env.YH_USER_ID,
            recvType: "user",
            contentType: "html",
            content: { text: msg },
        }),
    });
    return response.json();
}

export default {
    async email(message, env, ctx) {
        let email_string = ``;
        const email_from = message.from;
        const email_to = message.to;
        email_string += `<div style="background-color: white; color: black;">
  <ul>
    <li>From: ${email_from}</li>
    <li>To: ${email_to}</li>
  </ul>
  <hr>`;
        const email_content = await PostalMime.parse(message.raw);
        const email_subject = email_content.subject;
        let email_text = email_content.html;
        if (email_text == null) {
            email_text = email_content.text;
        }
        email_string += `  <details>
    <summary>
      <strong style="font-size: 20px;">${email_subject}</strong>
    </summary>
    ${email_text}
  </details>
</div>`;
        await toYunhu(email_string, env);
    },
};

最后使用wrangler部署

发消息（这一章节较为复杂！）

新建一个普通worker用于发送邮件
无需wrangler
准备 Github REST API Token（用于调用markdown转html接口）
准备 Resend Email Token（用于发送邮件）
将域名解析到Resend（可选）（如果想用域名邮箱则必须）

打开云湖控制台并新建自定义输入指令

把每个表单ID对应的输入框名记下来！

打开cloudflare网页编辑器并编写代码

async function sendEmail(email_to, email_title, email_content, env) {
    const token = env.RESEND_EMAIL_TOKEN;
    const response = await fetch("https://api.resend.com/emails", {
        method: "POST",
        headers: {
            "content-type": "application/json",
            Authorization: `Bearer ${token}`,
        },
        body: JSON.stringify({
            from: "这里填入你的resend邮箱名，如果将域名解析到resend则可以填域名邮箱",
            to: email_to,
            subject: email_title,
            html: email_content,
        }),
    });
    return response.body;
}

async function toYunhu(msg, env) {
    const token = env.YH_BOT_TOKEN;
    const apiUrl =
        "https://chat-go.jwzhd.com/open-apis/v1/bot/send?token=" + token;
    const response = await fetch(apiUrl, {
        method: "POST",
        headers: { "Content-Type": "application/json; charset=utf-8" },
        body: JSON.stringify({
            recvId: env.YH_USER_ID,
            recvType: "user",
            contentType: "html",
            content: { text: msg },
        }),
    });
    return response.json();
}

async function toHTML(markdown, env) {
    const token = env.GH_REST_TOKEN;
    const response = await fetch("https://api.github.com/markdown", {
        method: "POST",
        headers: {
            Accept: "application/vnd.github+json",
            "User-Agent": "Markdown-To-Html-App",
            Authorization: `Bearer ${token}`,
            "X-GitHub-Api-Version": "2022-11-28",
        },
        body: JSON.stringify({ text: markdown }),
    });
    return response.text();
}

async function getEmailInfo(yhJson) {
    let email_info = {};
    let formJson = yhJson["event"]["message"]["content"]["formJson"];
    if (formJson == null) {
        formJson = yhJson["event"]["message"]["content"]["formjson"];
    }
    email_info["address"] = formJson["这里是 目标 输入框的表单ID"]["value"];
    email_info["title"] = formJson["这里是 标题 输入框的表单ID"]["value"];
    email_info["content"] = formJson["这里是 正文 输入框的表单ID"]["value"];
    return email_info;
}

export default {
    async fetch(request, env, ctx) {
        if (request.method == "POST") {
            const email_info = await getEmailInfo(await request.json());
            const address = email_info["address"];
            const title = email_info["title"];
            const content = await toHTML(email_info["content"], env);
            const email_response = await sendEmail(
                address,
                title,
                content,
                env,
            );
            await toYunhu("已发送", env);
            return new Response(email_response);
        }
    },
};

在 worker设置 -> 变量和机密那里新建变量

GH_REST_TOKEN：你的Github REST API Token
RESEND_EMAIL_TOKEN：你的Resend Email Token
YH_BOT_TOKEN：你的云湖机器人Token
YH_USER_ID：你的云湖ID

部署完成

使用云湖开放API部署云湖邮局

收消息

发消息（这一章节较为复杂！）