gnus: Sieve Commands

 
 2.18.5 Sieve Commands
 ---------------------
 
 Sieve is a server-side mail filtering language.  In Gnus you can use the
 ‘sieve’ group parameter (SeeGroup Parameters) to specify sieve
 rules that should apply to each group.  Gnus provides two commands to
 translate all these group parameters into a proper Sieve script that can
 be transferred to the server somehow.
 
    The generated Sieve script is placed in ‘gnus-sieve-file’ (by default
 ‘~/.sieve’).  The Sieve code that Gnus generate is placed between two
 delimiters, ‘gnus-sieve-region-start’ and ‘gnus-sieve-region-end’, so
 you may write additional Sieve code outside these delimiters that will
 not be removed the next time you regenerate the Sieve script.
 
    The variable ‘gnus-sieve-crosspost’ controls how the Sieve script is
 generated.  If it is non-‘nil’ (the default) articles is placed in all
 groups that have matching rules, otherwise the article is only placed in
 the group with the first matching rule.  For example, the group
 parameter ‘(sieve address "sender" "owner-ding@hpc.uh.edu")’ will
 generate the following piece of Sieve code if ‘gnus-sieve-crosspost’ is
 ‘nil’.  (When ‘gnus-sieve-crosspost’ is non-‘nil’, it looks the same
 except that the line containing the call to ‘stop’ is removed.)
 
      if address "sender" "owner-ding@hpc.uh.edu" {
              fileinto "INBOX.ding";
              stop;
      }
 
    SeeEmacs Sieve (sieve)Top.
 
 ‘D g’
      Regenerate a Sieve script from the ‘sieve’ group parameters and put
      you into the ‘gnus-sieve-file’ without saving it.
 
 ‘D u’
      Regenerates the Gnus managed part of ‘gnus-sieve-file’ using the
      ‘sieve’ group parameters, save the file and upload it to the server
      using the ‘sieveshell’ program.