Many users tend to refile messages destined to a mailing-list to a folder whose name is the same as the mailing-list. Mew provides a mechanism to guess a mailing-list folder for messages destined to mailing-lists.
Suppose that you have a folder named +misc/pooh-lovers. The following message is probably to be refiled to this folder.
To: pooh-lovers@mew.org
Likewise, Mew searches a matching folder forward with addresses on To: and Cc:. There are many people who don't use recursive folders. With Mew, however, you would not be smart if you don't use it.
Smart users may wonder that they get a trouble in the following situation where private addresses are on To: or Cc:.
To: piglet@mew.org Cc: pooh-lovers@mew.org
Since pooh is a member of pooh-lovers, he receives this message. But he has a folder for his friend, pooh. So, +from/piglet may be chosen.
To avoid this, Mew allows you to specify which folders are to be ignored. The default is +from. So, please take a convention to refile personal messages under +from.
When Mew guesses a candidate by the folders, it asks you:
Folder name (+misc/pooh-lovers): +
Just type `RET' if the default is exactly what you want.
If you specify a new folder with `o', the folder is created and added to the folder list to be used for guess. Convenient, isn't it?
The function name to provide this feature is `mew-refile-guess-by-folder'.