Lanny Marcus wrote: <snip> > However, in the imap.gmail.com folder > INBOX.msf file properties, > Type is shown as C source code > and MIME type is shown as text/x-csrc This is irrelevant, whatever tool you are using to see the "type" of that file is wrong. > If someone on the list can point me to where the mbox files for > Thunderbird on Linux are located, that will be much appreciated. You didn't tell us where you're looking, so I can't be sure... But I suspect you're looking in the right place. However with IMAP the mail can stay on the server, so unless you tell your MUA to download a copy locally you only see index files.