One of the strong points of exmh is its support for mail filtering systems that file messages into different folders as they are delivered.
Filters look for patterns in the mail headers.
For example, you can put all mail from your boss into one folder and all mail from a mailing list or digest into another folder. The standard MH mail filtering system is described in the Chapter Processing New Mail Automatically . You can also use the procmail system or even write your own. Filtering and the Unseen Sequence exmh supports filters that use the rcvstore program to file messages into different folders as they arrive. It visually highlights the folders that have new mail.