import smtplib
import os

s= smtplib.SMTP('smtp.sendgrid.net', 587)
s.starttls()
#(220, 'Begin TLS negotiation now')
s.ehlo("staging2.pq.dsd.io")
#(250, 'smtp.sendgrid.net\n8BITMIME\nPIPELINING\nSIZE 31457280\nSTARTTLS\nAUTH PLAIN LOGIN\nAUTH=PLAIN LOGIN')
s.login(os.environ['SMTP_USERNAME'], os.environ['SMTP_PASSWORD'])
#Traceback (most recent call last):
#  File "<stdin>", line 1, in <module>
#  File "/usr/lib/python2.7/smtplib.py", line 622, in login
#    raise SMTPAuthenticationError(code, resp)
#smtplib.SMTPAuthenticationError: (535, 'Authentication failed: Bad username / password')