sieve not updating headers?

[Daniel J. Luke]

On Jun 11, 2021, at 9:54 AM, Daniel J. Luke <dluke at geeklair.net> wrote:
> On Jun 11, 2021, at 3:51 AM, Vincent Brillault <vincent.brillault at cern.ch> wrote:
>>> It then falls through my personal sieve filter and hits the implicit
>>> keep at the end and ends up in my inbox - with the original headers.
>> 
>> I had a similar issue recently (with addheader, not deleteheader) and I
>> was pointed to the RFC:
>> https://datatracker.ietf.org/doc/html/rfc5293#section-5
>> 
>> ```
>> The deleteheader action does not affect Sieve's implicit keep.
>> ```
> 
> I haven't gone over the RFCs with a fine toothed comb, but having implicit and explicit keep with different behaviors is surprising.
> 
>> My addheader case was solved by adding an explicit keep or a fileinto.
> 
> I added a keep; to then end of my before.sieve and it doesn't change the behavior (with or without the deleteheaders I always see the other hosts X-Spam headers in the delivered mail).

While that didn't work, adding a keep to the end of the user rules works - and even better, I don't need the deleteheaders (as it preserves the headers as set by the spamc filter).

This behavior is very surprising to me (I wouldn't expect rules ending with an explicit keep to be any different from rules ending with an implicit one), but at least it's working now - and hopefully being in the list archive will save someone else some time in the future.

-- 
Daniel J. Luke