I know mutt detects new mail in mbox format by comparing the last access time with the modification time of the file. However I can't find anywhere that tells me the exact logic.
In particular if the last access time is the *same* as the modification time does mutt treat the mailbox as having new mail or not? It seems to me that it should treat this case as new mail but, from what I'm seeing it would seem that it doesn't. On my system (Ubuntu 8.10) it seems impossible to create a file with an access time before the modification time. One can *add* to an exisitng mailbox and set the modification time later than the access time but one cannot *create* a new mbox file with access before modification. -- Chris Green
