Nodemailer错误550和发件人验证

Question

我正在尝试连接到远程SMTP服务器，但是我不断收到以下错误消息：

rejectedErrors: 
   [ { Error: Recipient command failed: 550 No such domain at this location
    at SMTPConnection._formatError (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:605:19)
    at SMTPConnection._actionRCPT (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:1416:24)
    at SMTPConnection._responseActions.push.str (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:1383:30)
    at SMTPConnection._processResponse (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:764:20)
    at SMTPConnection._onData (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:570:14)
    at Socket._socket.on.chunk (/var/app/current/node_modules/nodemailer/lib/smtp-connection/index.js:522:47)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at Socket.Readable.push (_stream_readable.js:208:10)
    at TCP.onread (net.js:597:20)
       code: 'EENVELOPE',
       response: '550 No such domain at this location',
       responseCode: 550,
       command: 'RCPT TO',
       recipient: 'testAccount1234@yahoo.com' } ] }

我的配置对象设置为：

mailConfig = {
        pool: true,
        maxConnections: maxConnections,
        maxMessages: maxMessages,
        rateDelta: rateDelta * 1000,
        rateLimit: maxMessages * maxConnections,
        secure: false,
        ignoreTLS: true,
        logger:true,
        debug:true,

        // Mail server host to send mail through
        host: config.SMTP_Host,
        // Mail server port
        port: config.SMTP_Port,
    };

    // Mail server authentication
    if(config.SMTP_User && config.SMTP_Password){
        mailConfig.auth = {
            user: config.SMTP_User,
            pass: config.SMTP_Password
        }
    }

研究此错误使我进入了发件人验证的主题，并想知道nodemailer是否正在尝试使用我未设置的服务器验证某些内容。不幸的是，服务器的内部工作方式对我来说还是个谜，因为我没有对其进行设置，也无法在不通过电子邮件发送给他人的情况下更改其配置。因此，我希望为他们指明正确的方向。