dovecot - Mar 2015 - Sieve editheader should support adding Received and Auto-Submitted headers

In order to simplify auto-response suppression and other filtering, I want to
synthesise an Auto-Submitted header on notification mails that should have them
but do not.

In a sieve file I add the following: 

  if anyof ( header :contains ["From","Sender"] ?info at
example.com" ) {
    if header :contains "Subject" [" just joined ","
just left "] {
     if not exists "Auto-Submitted" {
        addheader "Auto-Submitted" "auto-generated (via
sieve)";
     }
  }

However this doesn?t work and results in the following error
> main script: line 205: warning: addheader action: specified header field
`Auto-Submitted' is protected; modification denied.
(Workaround for this specific issue would probably be to use a List-* header
instead.)

Looking at 
http://hg.rename-it.nl/dovecot-2.2-pigeonhole/file/c8edece267cd/src/lib-sieve/plugins/editheader/ext-editheader-common.c
I can see that "Auto-Submitted? and ?Received? are hardcoded to be blocked
without reference to whether they are to be added or removed.

However, the hard restriction in RFC 5293 on Auto-Submitted and Received only
applies to the use of deleteheader and not addheader.

https://tools.ietf.org/html/rfc5293#section-6
>    As a matter of local policy, implementations MAY limit which header
>    fields may be deleted and which header fields may be added.  However,
>    implementations MUST NOT permit attempts to delete "Received"
and
>    "Auto-Submitted" header fields and MUST permit both addition
and
>    deletion of the "Subject" header field.
Using Dovecot version 2.1.7 but I assume it?s not version specific issue.

On 3/5/2015 12:05 AM, Lee Maguire wrote:
> However, the hard restriction in RFC 5293 on Auto-Submitted and
> Received only applies to the use of deleteheader and not addheader.
> https://tools.ietf.org/html/rfc5293#section-6
>>    As a matter of local policy, implementations MAY limit which header
>>    fields may be deleted and which header fields may be added. 
However,
>>    implementations MUST NOT permit attempts to delete
"Received" and
>>    "Auto-Submitted" header fields and MUST permit both
addition and
>>    deletion of the "Subject" header field.
> Using Dovecot version 2.1.7 but I assume it?s not version specific issue.
Oh, looks like I missed that part.

Fixed:
http://hg.rename-it.nl/dovecot-2.2-pigeonhole/rev/c13471f102be

I've split up the configuration to allow separate configuration of
addheader/deleteheader.

Updated documentation:
http://hg.rename-it.nl/dovecot-2.2-pigeonhole/raw-file/c13471f102be/doc/extensions/editheader.txt

Regards,

Stephan.