Sieve addheader directive works only partially

[@lbutlr]

On 13 May 2020, at 12:10, Peter Folta <mail at peterfolta.net> wrote:
> However, if I also move the email to a different folder in the same if-block, the header gets added just fine:
> 
> require “editheader”;
> require “fileinto”;
> 
> if address :is "From” “special-sender at example.com” {
>    addheader “X-My-Custom-Header” “Header Value”;
>    fileinto “MyFolder”;
> }
> 
> Am I missing something?

My impression was that without a keep (impact or explicit) or fileinto, sieve modifications to the message are not written, but I can’t find anything to confirm that.

-- 
The person on the other side was a young woman. Very obviously a
	young woman. There was no possible way that she could have been
	mistaken for a young man in any language, especially Braille.