I would please appreciate help with a Thunderbird ver 31.3.0 problem on my two PC's (Windows 8 PRO 64-BIT and Windows 7 PRO 32-BIT) that prevents me from receiving emails dated 18 December 2014 and onwards. Sending is fine. I can though download the same email dated 17 December 2014 but no more. My Android Asus 7" Tablet and iPhone 4 are both able to receive/send emails and are both connected by wireless to my broadband router, the same one to which my PC's are connected. I have tried wireless on my PC's but still does not work. Contacted my broadband supplier in the UK (Sky) and went through all the Thunderbird settings which were fine. I then installed a GMK UK email account and downloaded emails no problem! My suspicion is therefore that there is some form of problem with Thunderbird/Mozilla's systems but not sure. Any assistance would be much appreciated. Thank you. Robert