How To Fix AOL Mail Error Code 521?

How To Fix Aol Mail Error Code 521

The AOL Mail error 521 is a common email error that occurs when you send bulk emails at a time. This error also occurs due to poor Internet connectivity, email spam, incomplete AOL Mail app installation, and virus-infected files on your computer. To know how to fix AOL Mail error code 521, follow the quick steps given below.

Solution 1: Run System File Checker (SFC)

  1. On your Windows computer, click the Start menu at the bottom-left corner of the desktop.
  2. Type ‘cmd’ in the search panel and hit the Enter
  3. From the search result, right-click the Command Prompt app and select the Run as administrator
  4. In the Command Prompt window, type ‘sfc /scannow’ and press the Enter key to run the System File Checker.
  5. Wait until the scan is completed.
  6. The System File Checker will now scan all the junk and corrupted files in the system and repairs them automatically.

Solution 2: Update your Windows to its latest versions

  • On your Windows computer, launch the Settings app by pressing the Windows + I shortcut keys.
  • Click the Update & security tab in the Settings
  • Select the Windows Update option from the left-side panel.
  • Click the Check for updates tab on the right-side pane to check for updates manually.
  • If your computer detects any updates, install them.
  • To update them automatically, click on Advanced options and select the Automatic (recommended) option beneath Choose how updates are installed.

Solution 3: Clear browser cache and extensions

If you are using the Google Chrome browser, then make use of the following steps to clear the cache and extensions in the browser.

  1. First, launch Google Chrome and click the Customize and control Google Chrome icon at the top-right corner.
  2. Select More tools à Extensions.
  3. Choose the browser extensions you wish to remove and click the Remove
  4. If prompted, confirm your action by clicking Remove
  5. Again, go to the home page and click the Customize and control Google Chrome
  6. Click More tools à Clear browsing data.
  7. Select All time as the time range and check the Cookies and other site data as well as Cached images and files
  8. Finally, click Clear data to remove the browser cache.
  9. This will fix the AOL Mail error code 521.
  10. For more details on how to fix AOL Mail error code 521, contact our technical experts by clicking the Call button on this page.