How do I send multiple attachments in one email using Nodemailer?

Below is an example of how you might adjust and complete your code. One common problem is that the "from" field together with other mail options (like "to", "subject", etc.) must be specified properly. You might try something like this:

JAVASCRIPTCopied
const nodemailer = require('nodemailer');

async function sendEmail() {
  // Create the transporter object with your SMTP server details
  let transporter = nodemailer.createTransport({
    host: 'smtp.example.com',   // Ensure this is the correct SMTP host
    port: 587,                  // Typically 587 is used for TLS, ensure it's the correct port
    secure: false,              // Use false for 587; true is generally for port 465
    auth: {
      user: 'username',         // Replace with your SMTP username
      pass: 'password'          // Replace with your SMTP password
    }
  });

  // Define mail options with all required fields
  let mailOptions = {
    from: '"Sender Name" <sender@example.com>', // Must be a valid sender email address
    to: 'recipient@example.com',                // List of recipients, comma-separated if more than one
    subject: 'Test Email',                      // Subject line
    text: 'Hello world?',                       // Plain text body
    html: '<b>Hello world?</b>'                 // HTML body content (optional)
  };

  // Send the email using the transporter
  try {
    let info = await transporter.sendMail(mailOptions);
    console.log('Message sent: %s', info.messageId);
  } catch (error) {
    console.error('Error occurred:', error);
  }
}

sendEmail();

Debugging Tips

1. Validate the SMTP Configuration:

   • Confirm the host, port, and authentication details match what your email provider requires.
   • For example, if using Gmail, you’ll need to use the correct host and application-specific passwords.

2. Proper From Field:

   • Ensure the "from" field contains a valid email address in the proper format (e.g., "Sender Name" <sender@example.com>).

3. Check for Additional Requirements:

   • Some SMTP servers may require secure connections or specific TLS options. If needed, add additional configuration (e.g., tls: { rejectUnauthorized: false }).

4. Examine Error Logs:

   • Look at the error message printed in the console. It can provide clues such as authentication failures or connection issues.

Following these steps should help you isolate and fix the issue observed in your email sending function.