The error "SMTPAuthenticationError" usually occurs when the email client (in this case, python) is unable to authenticate with the mail server using the provided credentials (username and password).
To correct the python code, you'll need to make sure that the credentials are correct and also check if the mail server requires any specific authentication method (e.g. TLS or SSL).
Here's an example of how you can send an email using Python's smtplib library:
Sample Code looks like this below.
import smtplib
sender_email = "sender@example.com"
receiver_email = "receiver@example.com"
password = "password"
message = """\
Subject: Hi there
This message is sent from Python."""
server = smtplib.SMTP('smtp.example.com', 587)
server.ehlo()
server.starttls()
server.login(sender_email, password)
server.sendmail(sender_email, receiver_email, message)
server.quit()