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Da ajuda em alpine :
OPTION: Pruning Rule
By default, Alpine will ask at the beginning of each month whether or not you want to rename your sent-mail folder to a name like sent-mail-month-year. (See the feature Prune Uses YYYY-MM to change the format of the folder to sent-mail-yyyy-mm.) It will also ask whether you would like to delete old sent-mail folders. If you have defined Read Message Folder or Pruned Folders Alpine will also ask about pruning those folders.
With this option you may provide an automatic answer to these questions. The default value is to ask you what you'd like to do.
The six possible values for this option are:
ask about rename, ask about deleting
This is the default. Alpine will ask whether you want to rename the folders and whether you want to delete each of the old folders.ask about rename, don't delete
Alpine will ask whether you want to rename the folders, but won't ask about or delete old folders.always rename, ask about deleting
This means you want to always answer yes and have Alpine automatically rename the folder if possible. You will also be asked about deleting old folders.always rename, don't delete
This means you want to always answer yes and have Alpine automatically rename the folder if possible. There will be no deleting of old folders.don't rename, ask about deleting
This means you want to always answer no. Alpine will not rename the folder. You will be asked about deleting old folders.don't rename, don't delete
This means you want to always answer no. Alpine will not rename the folder. There will be no deleting of old folders, either.