What do I do about this warning I am receiving when I refresh my inbox? "The certificate for pop.windstream.net is not valid. Someonecould be trying to impersonate the server and you should not continue"

Certificate problems can be caused by a number of reasons, including: - Incorrect server settings – especially connection security or server mismatch. Confirm that your server settings are correct. Here are Windstream's recommended settings: https://www.gokinetic.com/support/my-account/email-101/what-server-settings-do-i-use-for-windstream-email - Antivirus or Proxy – it can modify certificates with its own and interfere with connection security. As a test, disable them or create an exception for Thunderbird. - Expired Certificate – due to incorrect date & time or genuine expiration. This would be only correctable by Windstream. They may already be aware of it and are working on a fix, so if you just wait a while the problem may go away. It might be worth a call to them to report the problem and get a status update.