Class MailApp

const emailQuotaRemaining = MailApp.getRemainingDailyQuota();
Logger.log(`Remaining email quota: ${emailQuotaRemaining}`);

// This code fetches the Google and YouTube logos, inlines them in an email
// and sends the email
function inlineImage() {
  const googleLogoUrl =
      'https://www.gstatic.com/images/branding/googlelogo/1x/googlelogo_color_74x24dp.png';
  const youtubeLogoUrl =
      'https://developers.google.com/youtube/images/YouTube_logo_standard_white.png';
  const googleLogoBlob =
      UrlFetchApp.fetch(googleLogoUrl).getBlob().setName('googleLogoBlob');
  const youtubeLogoBlob =
      UrlFetchApp.fetch(youtubeLogoUrl).getBlob().setName('youtubeLogoBlob');
  MailApp.sendEmail({
    to: 'recipient@example.com',
    subject: 'Logos',
    htmlBody: 'inline Google Logo<img src=\'cid:googleLogo\'> images! <br>' +
        'inline YouTube Logo <img src=\'cid:youtubeLogo\'>',
    inlineImages: {
      googleLogo: googleLogoBlob,
      youtubeLogo: youtubeLogoBlob,
    },
  });
}

MailApp.sendEmail(
    'recipient@example.com',
    'TPS reports',
    'Where are the TPS reports?',
);

// Send an email with two attachments: a file from Google Drive (as a PDF) and
// an HTML file.
const file = DriveApp.getFileById('1234567890abcdefghijklmnopqrstuvwxyz');
const blob = Utilities.newBlob(
    'Insert any HTML content here',
    'text/html',
    'my_document.html',
);
MailApp.sendEmail(
    'mike@example.com',
    'Attachment example',
    'Two files are attached.',
    {
      name: 'Automatic Emailer Script',
      attachments: [file.getAs(MimeType.PDF), blob],
    },
);

MailApp.sendEmail(
    'recipient@example.com',
    'replies@example.com',
    'TPS report status',
    'What is the status of those TPS reports?',
);