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  • 22 Jul 2024

“Learn how to enable SMTP authentication in Outlook 365 for 2024. Follow our step-by-step guide to secure your email and enhance deliverability.”

How to Enable SMTP Authentication in Outlook 365

SMTP (Simple Mail Transfer Protocol) authentication is essential for sending emails securely and ensuring that your emails are not flagged as spam. Enabling SMTP authentication in Outlook 365 helps protect your email account from unauthorized access and enhances the security of your communications. Here’s a step-by-step guide on how to enable SMTP authentication in Outlook 365.

Step-by-Step Guide to Enabling SMTP Authentication

1. Open Outlook 365

Launch Outlook 365 on your computer. Ensure you are logged in with the account you want to enable SMTP authentication.

2. Access Account Settings

Click on the File tab in the upper-left corner of the screen. From the dropdown menu, select Account Settings and then click on Manage Profiles.

3. Open Email Accounts

In the Mail Setup dialog box, click on Email Accounts to open the Account Settings window.

4. Select Your Email Account

You will see a list of your email accounts in the Email tab. Select the email account you want to enable SMTP authentication for and click Change.

5. More Settings

In the Change Account window, click on More Settings in the lower-right corner.

6. Outgoing Server Tab

In the Internet Email Settings window, navigate to the Outgoing Server tab.

7. Enable SMTP Authentication

Check the box that says My outgoing server (SMTP) requires authentication. Ensure that The same settings as my incoming mail server are selected. This ensures that Outlook uses the same login credentials for sending emails as it does for receiving them.

8. Advanced Settings

Navigate to the Advanced tab. Verify that the settings for your SMTP server are correct. Typically, the port for SMTP is 587 with TLS encryption or 465 with SSL encryption.

9. Save and Close

Click OK to close the Internet Email Settings window. Then, click Next in the Change Account window, followed by Finish and Close to save your settings.


Enabling SMTP authentication in Outlook 365 is a straightforward process that significantly enhances the security of your email communications. By following these steps, you ensure that your email account is protected from unauthorized access and that your emails are less likely to be marked as spam.

For more advanced email management services and solutions, consider visiting Inbox Automation. They offer services designed to streamline your email processes and improve deliverability, ensuring your emails reach the right audience securely and efficiently.

Incorporating SMTP authentication is just one step towards securing your email communications. For comprehensive email management solutions, Inbox Automation provides expert services tailored to your business needs. Explore their offerings to enhance your email security and efficiency.


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