My Thunderbird incoming email has been clogged for the last four days. Nothing new coming in. It has happened three or four times in the last few years, but now I have experienced it twice in two weeks. The last incoming email gets repeated over and over. I now have a couple hundred of the same email message at the top of my inbox. I am able to get new mail on Horde and on my phone, but it is obviously very awkward. Can someone guide me in removing the block? Thanks. Richard