Attachments

import fs from 'fs';

const fileContent = fs.readFileSync('invoice.pdf');
const base64Content = fileContent.toString('base64');

await lettr.emails.send({
  from: 'you@example.com',
  to: ['recipient@example.com'],
  subject: 'Your Invoice',
  html: '<p>Please find your invoice attached.</p>',
  attachments: [
    {
      name: 'invoice.pdf',
      data: base64Content,
      type: 'application/pdf'
    }
  ]
});

await lettr.emails.send({
  from: 'you@example.com',
  to: ['recipient@example.com'],
  subject: 'Project Files',
  html: '<p>Here are the requested files.</p>',
  attachments: [
    {
      name: 'report.pdf',
      data: reportBase64,
      type: 'application/pdf'
    },
    {
      name: 'data.xlsx',
      data: excelBase64,
      type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
    },
    {
      name: 'image.png',
      data: imageBase64,
      type: 'image/png'
    }
  ]
});

await lettr.emails.send({
  from: 'you@example.com',
  to: ['recipient@example.com'],
  subject: 'Email with Image',
  html: '<p>Check out this image:</p><img src="cid:logo" />',
  attachments: [
    {
      name: 'logo.png',
      data: logoBase64,
      type: 'image/png'
    }
  ]
});

attachments: [{ name: 'invoice.pdf', data: base64String, type: 'application/pdf' }]

{
  "error_code": "validation_error",
  "message": "The given data was invalid.",
  "errors": {
    "attachments.0.data": ["The attachments.0.data field must be a valid base64 string."],
    "attachments.0.name": ["The attachments.0.name field is required."]
  }
}