The topic could be settings either if I have not used a setting that I should have. If I delete an email on my PC it does not delete on my phone. However If I delete an email on my phone it also deletes from my PC. I really need this the other way round because I am more likely to tidy up my phone and deal with emails later on my PC. I am only at the beginning of learning to use the features of Thunderbird so any basic help that you can offer would be much appreciated. I set up a filter for a newsletter that comes very often so that I can delete it in blocks when it becomes out of date. I set up a new folder for it in my inbox. This is working well and the new folder and contents appear on my phone and Kindle. However my plan was to be able to read and delete emails from this folder on my PC with the expectation that they would then be deleted from my phone and Kindle. However they are still there. I am sure that there must be a box somewhere that I have failed to tick or untick and so if you could point me in the right direction then I should be most grateful. Thank you Patricia