Check Firewall Exit Thunderbird Access Firewall which may be controlled by your Anti-Virus product. Thunderbird must be set up as an allowed program. Please confirm Thunderbird is set up as an allowed program. What Anti-Virus product are you using ? Please post the following information In Thunderbird * Help > Troubleshooting Information * Scroll down to 'Mail and News Accounts' * Copy all the info in that area and paste it into this support question. When you click on Get Messages what error message do you see ? Tell us word for word or better still create an image and upload it into this support question.