Class MailApp

var 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() {
  var googleLogoUrl = "https://www.gstatic.com/images/branding/googlelogo/1x/googlelogo_color_74x24dp.png";
  var youtubeLogoUrl =
        "https://developers.google.com/youtube/images/YouTube_logo_standard_white.png";
  var googleLogoBlob = UrlFetchApp
                         .fetch(googleLogoUrl)
                         .getBlob()
                         .setName("googleLogoBlob");
  var 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.
var file = DriveApp.getFileById('1234567890abcdefghijklmnopqrstuvwxyz');
var 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?");