如何通过Node.js使用Postmark发送PDF及邮件附件？

云原生阿岚

2026-6-18

如何用Postmark发送带PDF、图片等附件的邮件？

当然可以，Postmark完全支持发送PDF、图片这类自定义附件，你只需要在请求的Attachments数组中配置好附件的相关信息就行。

附件配置说明

每个附件对象需要包含三个核心字段：

Name：收件人看到的附件文件名（比如"appointment-detail.pdf"）
Content：文件内容的Base64编码字符串
ContentType：文件对应的MIME类型（比如PDF用"application/pdf"，JPG图片用"image/jpeg"）

修改后的代码示例

假设你用Node.js环境，以下是添加了PDF和图片附件的完整代码：

const fs = require('fs');
// 读取文件并转成Base64编码
const pdfContent = fs.readFileSync('./appointment-detail.pdf').toString('base64');
const imageContent = fs.readFileSync('./clinic-logo.jpg').toString('base64');

await client.sendEmail({
    "From": "mywebsite@support.com",
    "To": email,
    "Subject": "Appointment Confirmation",
    "Attachments": [
        {
            "Name": "appointment-detail.pdf",
            "Content": pdfContent,
            "ContentType": "application/pdf"
        },
        {
            "Name": "clinic-logo.jpg",
            "Content": imageContent,
            "ContentType": "image/jpeg"
        }
    ],
    "TextBody": `
        Dear ${fullname},

        Your appointment has been confirmed with the following details:

        Title: ${title}
        Date: ${event_date.toDateString()}
        Time: ${start_time} - ${end_time}
        Purpose: ${purpose}

        Thank you for using our service.

        Best regards,
        Your Appointment Team

        if you encounter any problem or concern, please email myemail
    `,
    "MessageStream": "outbound"
});