Thunderbird does not have a helpline. This forum is the closest you'll get to "official" help. There may be services out there who will take your money but none of them are sanctioned or approved. For anyone here to be able to help you, you'll have to provide more information. Who is your email provider? What version of Thunderbird are you using and on what operating system? Is this affecting just one, or several computers? Did anything change at the time it all stopped working? Posting your Troubleshooting Information from an affected computer may be useful. To find the Troubleshooting information: * Open Help (or click on three-line-icon and select Help) * Choose Troubleshooting Information * Use the button Copy to clipboard to select all. Do not check box "Include account names"! * Paste this in your post. Please also add the result of these troubleshooting steps to your post *Does Thunderbird work in TB Safe mode (see [http://mzl.la/1k5DWjq Thunderbird Safe Mode])? *Do you use anti-virus and firewall software? What is the version? *Who is the email provider? *Who is the internet provider? *What is the exact error message? *What steps did you take right before this happened? Please post back with this information and any other questions you might have.