Re: sieve not updating headers?

Hi!

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.

My addheader case was solved by adding an explicit keep or a fileinto.

I hope that will also help you, Vincent