You may be experiencing issues syncing your AOL mail account with your Outlook 2021
. First, make sure you have the correct login credentials. Then, make sure you have a stable, smooth connection. If all else fails, your internet connection might be down, and you can't send and receive emails. Then, make sure you're using the latest version of your web browser and have it cleared of any cache.
For more info, visit: https://emailscrunch.educatorpages.com/pages/why-wont-aol-work-with-outlook