Hi mercury11111, I am going to change this to Thunderbird, if you are talking about the mail client for the desktop. However if it is Firefox OS, what version are you using (check the Settings > About this device). Try resetting your profile as well. See also[http://www.parhelia-tools.com/products/thunderfix/thunderfix.aspx] I will move this first to see if we can get a specialist in Thunderbird as well. If it is indeed for Firefox OS, in order to better understand and investigate on the issue that you are encountering, please reply to this message with the following information: * What is the model of your phone? (ZTE Open, LG Fireweb or Alcatel OneTouch Fire) * What is the OS version found in the Device Information page? Please visit [http://mzl.la/Gzz6Kp this link] if you need help finding the Build ID of your phone. * Please provide the exact steps to reproduce the issue you are encountering. * Who is your current cell phone carrier? * How often do you encounter this issue? Please be sure to include as much detail as possible, including any websites that may exhibit this issue, and any error messages that you may be receiving, exactly as they appear. This will ensure that we will have all the information needed to investigate into this. Thank you for your help and we look forward to hearing from you!