Outlook Security Alert Certificate Keeps Popping Up – Fixed

Summary: Herein may be a lot of factors depending on whether Outlook security alert certificate keeps popping up or Outlook keeps asking for a server certificate. Here, you can find the exact causes and solutions. Don’t be afraid of the error because there is always a way to fix them.

Many people use Microsoft Outlook to send and receive emails, but you might experience some problems while using it and occurs Microsoft Outlook send and Receive Error. One of these problems is the Microsoft Outlook security certificate error. This error occurs when you can’t verify the company’s digital certificates, which means you can establish no encrypted connection with other email servers to send emails.

Reasons For Outlook Security Certificate Error

If you see a security certificate error when opening Microsoft Outlook security alert certificate keeps popping up, it could be for one of the following reasons:

  1. Invalid security certificate

When a security certificate expired Outlook, it means that the company that issued the certificate is no longer vouching for the identity of the site that’s using it. Consequently, your browser will no longer trust the site, or your mail server certificate is invalid, and it will display a warning.

  1. The security certificate has Incorrect Date

Sometimes companies will purchase security certificates for multiple websites and then forget to update the certificate when they make changes to their website’s DNS settings. As a result, visitors to the website may see a warning message because the certificate doesn’t match the actual website address.

  1. The security certificate has been revoked

If a security certificate has been revoked, it is no longer valid and should not be trusted. It usually happens if the company who issued the certificate discovers that it was issued improperly or if the website using it has been involved in fraudulent activity. So, the Outlook security alert certificate keeps popping up on the computer screen.

  1. Server configuration is not correct

A certificate error is a common problem for Outlook users. The error may occur if there is a problem with the server’s configuration or if the server’s certificate has expired or been revoked.

How to Fix Outlook Security Certificate Error

You may get a security certificate error in Outlook because the website’s security certificate has expired or is invalid. Here’s how to fix it.

  1. We just need to double-check that your computer’s time is set correctly. If it’s not correct, you may get a security certificate error. To set the date and time:

– On Windows 10, go to Start > Settings > Time & Language.

– On Windows 8, go to Search > type Date and Time > click Change date and time settings.

– On Windows 7, click the clock in the taskbar > click Change date and time.

  1. Check if your computer is set to the right time zone. Incorrect time zone settings can also cause security certificate errors. Here’s how to set the time zone:

– To turn on the automatic time zone in Windows 10, go to Start > Settings > Time & Language. Then go to Date & Time. Activate “Set time zone automatically.”

– On Windows 8, go to Search > type Date and Time > click Change date and time settings > under “Additional clocks,” add or remove a clock for your current time zone.

– On Windows 7, click the clock in the taskbar > click Change date and time.

Users can quickly fix the security certificate error from the above quick methods. If the Outlook security alert certificate keeps popping up, you may want to try these steps.

Method 1: Use Domain Name of your Hosting as Mail Server

If you use Microsoft Outlook to manage your email, you may have come across the “Security Certificate Error” message. This error can occur for a number of reasons, but most often it’s because the domain name of your hosting provider’s mail server doesn’t match the server’s Common Name (CN) in the security certificate.

Maybe the hosting company does not renew the SSL certificate for each domain; it renews only its own certificate.

To fix Outlook security alert certificate keeps popping up errors, simply change the mail server settings in Outlook to use the domain name of your hosting provider as the mail server. For example, if your hosting provider’s domain name is “mail.yourhostingdomain.com“, you would change the mail server setting to “mail.yourdomain.com“.

Once you’ve made this change, restart Outlook and the error message should no longer appear.

Method 2: Verify the Certificate Name

If you’re getting a certificate error when opening Outlook, it could be because the name on the certificate doesn’t match the name of the server that you’re trying to connect to. Now, we will try to verify the certificate name.

  1. To resolve the Outlook security certificate error, click View Certificate.
  2. Simply select the Issued to Name and ensure the name on the certificate matches what you see on your mail server.
  3. If the mail server name and certificate name are not the same, change it and restart the application.

Hopefully this will fix the Outlook security alert certificate keeps popping up errors and you’ll be able to access your account without any problems. If Outlook security certificate cannot be verified you can try another method.

Method 3: Use Unsecure Port

If you’re getting an error when trying to connect to Microsoft Outlook, it could be because of the Unsecure Port.

Some mail servers are blocked at companies and other organizations. Common mail servers are blocked because of security reasons. However, a few ports can be used to send data securely. These ports aren’t necessarily blocked, but they do raise some security concerns. The following is a list of unsecured ports:

  • IMAP 143
  • POP 110
  • SMTP 587

You should now be able to connect to Microsoft Outlook without any issues. If you find any issues and still Outlook security alert certificate keeps popping up on the display you can try another method.

Method 4: Change the Outgoing SMTP Port

If you’re getting the Microsoft Outlook security certificate error, one thing you can try is changing the outgoing SMTP port.

  1. Open MS Outlook, and press the File menu.
  2. Choose Account Settings under the Info option from the left panel.
  3. Select your email account from the Account Settings option and press Change.
  4. Click More Settings and go to the Advanced tab.
  5. Locate the Outgoing server (SMTP) port. Change it, and click OK.
  6. Save your changes and try sending an email again.

Conclusion

Admittedly, Outlook security alert certificate keeps popping up, and Outlook keeps asking for server certificates are widespread problems among Outlook users. The first thing we need to do is figure out the exact root cause of this problem. I believe that users query why does my outlook email say not secure is solved. We can deal with such issues better and faster.