multi-send.gs

/*
 * Send a newsletter or any emails to multiple users easily, no need to use bcc
 * If you are a workspace user with license > Business Standard you already have the multi-send
 * https://support.google.com/google-workspace-individual/answer/11243118
 */
 
function sendMyNewsletter() {
  let emails = 'COMA_SEPARATED_LIST_OF_EMAILS_NO_SPACE'
  let subject = 'SUBJECT OF THE EMAILS IN YOUR DRAFT';
  let draft = GmailApp.getDraftMessages().find(message => { return message.getSubject() == subject  });
  if(!draft){console.log('No draft found');return ;}
  emails.split(',').forEach(email => {
    GmailApp.sendEmail(email, draft.getSubject(), draft.getPlainBody(), {
    "from": draft.getFrom(),
    "htmlBody": draft.getBody() });
    console.log('Email sent to : '+email); });
}