Скачать или смотреть Resolving SMTP Connection Issues: How to Fix Your Python Script for Port 465

Encountering connection issues while trying to send emails via Python's SMTP? Discover how to effectively troubleshoot and fix connection problems when using port 465 for email sending.
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This video is based on the question https://stackoverflow.com/q/62692227/ asked by the user 'wotesi' ( https://stackoverflow.com/u/7959646/ ) and on the answer https://stackoverflow.com/a/62692865/ provided by the user 'kommmy' ( https://stackoverflow.com/u/9345289/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing SMTP Connection Issues in Python

In today's digitally connected world, sending emails programmatically can be essential for businesses and developers alike. However, it can be frustrating when your Python script fails to connect to the SMTP server, especially when you're certain that the SMTP server address, port number, login, and password are correct. If you've encountered the error message: "Failed to connect to the server. Wrong user/password?" while trying to send an email using port 465, this guide is here to help you resolve that issue.

Understanding the Problem

When attempting to send an email through an SMTP server using Python, you might run into connection problems. The error you're getting usually suggests that there is something wrong with your connection settings, despite your credentials being correct. Here’s a quick recap of your original script:

[[See Video to Reveal this Text or Code Snippet]]

As you've noted, despite seemingly correct details in the code, the connection is not established. Let's explore a solution.

A Simple Solution: Using SSL

One common issue with connecting to SMTP servers over port 465 is that it typically requires a secure connection. For this, you need to use SSL (Secure Sockets Layer) protocol. Instead of using smtplib.SMTP(), which establishes an unsecured connection, you should use smtplib.SMTP_SSL(). This method automatically wraps your connection in SSL.

Here’s how you can modify your code:

Replace the line:

[[See Video to Reveal this Text or Code Snippet]]

with:

[[See Video to Reveal this Text or Code Snippet]]

Doing this will initiate a secure connection, allowing you to communicate with the server securely.

Updated Code Example

Here's how your updated script should look:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By using smtplib.SMTP_SSL() for your connection instead of the standard smtplib.SMTP(), you ensure that your communication with the SMTP server is secure and compliant with modern email server requirements. This simple change should resolve the issues you were experiencing, allowing you to send emails smoothly through your Python script.

Don't forget to test your script after making this adjustment to ensure everything is working as expected. Happy emailing with Python!