custom.py

import smtplib

host = "smtp.gmail.com"
port = 587
username = "hungrypy@gmail.com"
password = "iamhungry2016"
from_email = username
to_list = ["hungrypy@gmail.com"]

email_conn = smtplib.SMTP(host, port)
email_conn.ehlo()
email_conn.starttls()
email_conn.login(username, password)
email_conn.sendmail(from_email, to_list, "Hello there this is an email message")
email_conn.quit()


from smtplib import SMTP


ABC = SMTP(host, port)
ABC.ehlo()
ABC.starttls()
ABC.login(username, password)
ABC.sendmail(from_email, to_list, "Hello there this is an email message")
ABC.quit()


from smtplib import SMTP, SMTPAuthenticationError, SMTPException


pass_wrong = SMTP(host, port)
pass_wrong.ehlo()
pass_wrong.starttls()
try:
    pass_wrong.login(username, "wrong_password")
    pass_wrong.sendmail(from_email, to_list, "Hello there this is an email message")
except SMTPAuthenticationError:
    print("Could not login")
except:
    print("an error occured")

pass_wrong.quit()