Keep losing my emails on my pc after 3 weeks using Thunderbird. Tried checking settings many times but cannot fixed the problem. I basically want to keep my emails permanently on my pc once downloaded from my email server. Also I once downloaded I want to clear emails from the email server which has only got a limited capacity. Please help or advice where the settings are to do the above thanks a lot. I have already spent many hours on this but cannot figure this out. After 3 weeks Thurderbird removed all my emails on my pc