Why Am I Getting an 'SMTP AUTH extension not supported by server' Error When Sending Emails with Python and Gmail?

Sending Emails with Python and Gmail: Troubleshooting SMTP AUTH Error

When attempting to send emails using Gmail as the email provider via Python, you may encounter a "SMTP AUTH extension not supported by server" error. This error occurs when the SMTP server does not support the Authentication Exchange (AUTH) extension, which is required for secure SMTP connections.

To resolve this issue, we can modify our Python script to use a different SMTP port and authentication method. Here's an improved version of your Python script:

import smtplib

# Define email parameters
from_address = '[email protected]'
to_address = '[email protected]'
subject = 'Subject of your email'
body = 'Body of your email'
username = '[email protected]'
password = 'your_password'

# Use SMTP_SSL object and Port 465
server = smtplib.SMTP_SSL("smtp.gmail.com", 465)

# Establish SMTP connection
server.ehlo()
server.login(username, password)

# Send the email
server.sendmail(from_address, to_address, f"Subject: {subject}\n\n{body}")

# Close the SMTP connection
server.close()

By using SMTP_SSL and Port 465, we can establish a secure SMTP connection with Gmail and bypass the AUTH extension error. This will allow you to send emails successfully through Gmail using Python.

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