import smtplib

fromaddr = 'contoh@domain.com'
toaddrs  = 'penerima@gmail.com'

msg = """Subject: Testing

Hello world
"""

username = fromaddr
password = 'password'

server = smtplib.SMTP('smtp.domain.com:587')
server.starttls()
server.login(username,password)
server.sendmail(fromaddr, toaddrs, msg)
server.quit()