mailcow/src/mailcow-dockerized/data/web/inc/presets/sieve/sieve_1.yml

headline: lang.sieve_preset_1
content: |
  require ["reject","body","regex"];
  if anyof (body :raw :regex ["filename=.*\.doc","filename=.*\.exe","filename=.*\.moo"]) {
    reject text:
  doc, exe and moo are dangerous file extensions.
  Why would you do that? I am a sad cow.
  .
  ;
  }