New Mail Polling

[John P. Verel]

I am trying to understand how the status indicator in the folder list
(if I'm using the term correctly), gets updated
to show new mail in a folder.  

I've got a half dozen folders created
by procmail.  My mail_check is set to 5.  It often happens that I find
new mail within a folder (and new since last opened) but no "N"
indicator next to the folder...which is what I desire.

I'll appreciate your guidance on this.

Thank you.

John