def sendStarttls(host, sendingMail, receivingMail, password, message="",
                 subject="", port=587, cc=[], bcc=[]):
    context = ssl.create_default_context()

    if type(cc) is not str:
        cc = ",".join(cc)
    if type(bcc) is not str:
        bcc = ",".join(bcc)
    utf8Message = ("Subject: " + subject + "\nCC: " + cc + "\nBCC: " + bcc +
                   "\n\n" + message)
    decoded = utf8Message.encode('cp1252').decode('utf-8')

    with smtplib.SMTP(host, port) as serverConnection:
        serverConnection.starttls(context=context)
        serverConnection.login(sendingMail, password)
        serverConnection.sendmail(sendingMail, receivingMail, decoded)