On Fri, Jun 05, 2026 at 10:17 -0500, Ranjan Maitra via Mutt-users wrote:
I use the Maildir++ format with mutt....
Now it is my understanding that mutt moves accessed email from new to cur when a folder is accessed. However, the coloring appears to indicate that the mail is not read (unless we go to that message/file). Where does it get this information from? Is it from the access time of the file in cur which if later than the creation/edited time for the file is assumed that the file is read? Or something else?
I believe Mutt uses the maildir mechanism: when it displays a message, it sets that message's flag "seen", by adding the character 'S' in an optional short string near the end of the message filename.
See Wikipedia on maildir: <https://en.wikipedia.org/wiki/Maildir>
