Hi! I am faced with slow work and timeouts in Thunderbird at my Linux. I have 4 accounts (3 are connected via IMAP) and two of them work very slowly. At lest each hour I see annoying message about expiration of server timeout and each message (even old) is opening very-very slowly and sometimes doesn't open. It maybe that the problem in mail services themselves, or in that fact that the 4th account is Exchange (which work much more fast in fact), but I need to handle this somehow. I believe I had enough fast internet connection. I know that server timeout could be increased, but I didn't find this option in settings. I have TB 31, and all settings I found in Google seems to be related to old version with the old interfaces. I went to advanced settings, I am not sure which settings this is and what value it should contain. Also, has TB something like "mail caching"? I mean, when new letter is received - it's "cached" locally, so when I trying to read it - local version is used until "cache" is cleaned. But when I remove or move letter to another folder - it's also changed at the server. I think that if TB could synchronize all mails and store their values locally it will work much more faster. Thanks for any possible solution of this.