gnus: Client-Side IMAP Splitting

 
 6.3.3 Client-Side IMAP Splitting
 --------------------------------
 
 Many people prefer to do the sorting/splitting of mail into their mail
 boxes on the IMAP server.  That way they don’t have to download the mail
 they’re not all that interested in.
 
    If you do want to do client-side mail splitting, then the following
 variables are relevant:
 
 ‘nnimap-inbox’
      This is the IMAP mail box that will be scanned for new mail.  This
      can also be a list of mail box names.
 
 ‘nnimap-split-methods’
      Uses the same syntax as ‘nnmail-split-methods’ (SeeSplitting
      Mail), except the symbol ‘default’, which means that it should
      use the value of the ‘nnmail-split-methods’ variable.
 
 ‘nnimap-split-fancy’
      Uses the same syntax as ‘nnmail-split-fancy’.
 
 ‘nnimap-unsplittable-articles’
      List of flag symbols to ignore when doing splitting.  That is,
      articles that have these flags won’t be considered when splitting.
      The default is ‘(%Deleted %Seen)’.
 
    Here’s a complete example ‘nnimap’ backend with a client-side “fancy”
 splitting method:
 
      (nnimap "imap.example.com"
              (nnimap-inbox "INBOX")
              (nnimap-split-fancy
               (| ("MailScanner-SpamCheck" "spam" "spam.detected")
                  (to "foo@bar.com" "foo")
                  "undecided")))