Python, SMTP Error, socket.gaierror: [Errno -2] Name or service not known, smtp.gmail.com

server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()
server.login('email@gmail.com','password')

msg = 'Hello World'
server.sendmail('email@gmail.com','email@gmail.com',msg)
server.quit()

I'm getting a socket.gaierror: [Errno -2] Name or service not known for the first line server = smtplib.SMTP('smtp.google.com', 587). Trying stmp.office365.com seems to go through fine but gmail is not recognized.