Hello everyone, I'll try to explain my headache. I would like to share all mail folders between my Win7 - CentOS dual boot system. This work was well done (both for Local Folders and for Imap/Pop3 live accounts) till the time I decided to place mail folders into a crypted veracrypt container. The problem is that every time I start thunderbird, all "live" (various pop3 account and one imap account) mails are full downloaded, both for windows and for linux client. Local Folders are OK. I also moved (with thunderbird -profilemanager) windows and linux profiles into 2 different folders, into veracrypt container. This is what I don't understand: - Can I share user_pref("mail.server.server1.directory") live mail folder between different operative systems? Previously this was done, and email were downloaded only the first time. - All mails are downloaded to (each) profile folder or to this unique shared folder? - user_pref("mail.server.server4.directory", "P:\\Documenti\\Posta\\Thunderbird\\pop3s.pec.aruba.it"); AND user_pref("mail.server.server4.directory-rel", "[ProfD]../../pop3s.pec.aruba.it"); have to point to the same directory both for windows and linux prefs.js, or each S.O. has to point to its profile folder? Thank you very much for your help, I wish I make myself clear. Alessandro.