smtplib - How to send an email without login to server in Python

Question

I want to send an email without login to server in Python. I am using Python 3.6. I tried some code but received an error. Here is my Code :

import smtplib                          

smtpServer='smtp.yourdomain.com'      
fromAddr='from@Address.com'         
toAddr='to@Address.com'     
text= "This is a test of sending email from within Python."
server = smtplib.SMTP(smtpServer)
server.set_debuglevel(1)         
server.sendmail(fromAddr, toAddr, text) 
server.quit()

I expect the mail should be sent without asking user id and password but getting an error :

"smtplib.SMTPSenderRefused: (530, b'5.7.1 Client was not authenticated', 'from@Address.com')"

Answer 1

I am using like this. It's work to me in my private SMTP server.

import smtplib

host = "server.smtp.com"
server = smtplib.SMTP(host)
FROM = "testpython@test.com"
TO = "bla@test.com"
MSG = "Subject: Test email python

Body of your message!"
server.sendmail(FROM, TO, MSG)

server.quit()
print ("Email Send")