emails over 5 days old are deleted: -Hi i had trouble with outlook so changed to thunderbird for two email accounts i have. both are IMAP. one account works fine , old emails are stored asa re deleted and sent, however for my main (business) email, if i turn the computer off, i basically loose anything older than 5 days. i have the settings set to do not delete, but it keeps happening. sent items are kept, as are deleted emails, so i cant understand what is going on. the account also clears the server so i cant bring them back from there either. any ideas? if it keeps like this i will have to go back to outlook.