aInterface/routes/email.js

const nodemailer = require("nodemailer");
const config = require('./config')

const main = async (userEmail, usermessage) => {
    try {
        // let captcha = Math.floor(Math.random() * 9000) + 1000
        let transporter = nodemailer.createTransport({
            host: config.host,
            port: config.port,
            auth: {
                user: config.user, // 用户名
                pass: config.pass // 密码
            },
            tls: {
                rejectUnauthorized: false
            }
        });
    
        let info = await transporter.sendMail({
            from: '"1473" <postmaster@mail.1473.cn>', // sender address
            to: `${userEmail}`, // list of receivers
            subject: "邮件", // Subject line
            html: `<h2>${usermessage}</h2>`
        }); 

        return 'success'
    } catch (error) {
        return 'err'
    }

}

module.exports = main