sieve rule for "header don't exist"

[Reindl Harald]

Am 30.03.2015 um 11:41 schrieb Christian Kivalo:
> On 2015-03-30 11:25, Reindl Harald wrote:
>> is there a way to expresse when the header "X-Spam-Status" *do not*
>> exist move the message to a different folder?
>>
>> :contains, :matches and :is are not helpful here
>>
>
> Have you tried using the "exist" test from the sieve rfc

indeed - that works - thanks!

require ["fileinto"];
if not exists ["X-Spam-Status"]
{
  fileinto "REJECTED";
}
else
{
  keep;
}

> 5.5. Test exists
>
>
>     Usage:   exists <header-names: string-list>
>
>     The "exists" test is true if the headers listed in the header-names
>     argument exist within the message.  All of the headers must exist or
>     the test is false.
>
>     The following example throws out mail that doesn't have a From header
>     and a Date header.
>
>     Example:  if not exists ["From","Date"] {
>                  discard;
>               }
>
> https://tools.ietf.org/html/rfc5228#page-28
>
> i have not tried it myself but the core of rfc 5228 is reported to be
> fully support by pigeonhole

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