[BUG REPORT] Case sensitivity in :addresses in sieve vacation scripts

[Julian Kippels]

Am Tue, 08 Oct 2019 08:13:29 -0400
schrieb James Cassell via dovecot <dovecot at dovecot.org>:

> On Tue, Oct 8, 2019, at 7:58 AM, Julian Kippels via dovecot wrote:
> > Hi,
> > 
> > I have recently updated from Dovecot 2.2 to 2.3. Since I have
> > noticed that vacation responses from sieve are not working the same
> > anymore. For example, my sieve script looks like this:
> > 
> >  vacation :days 1 :addresses
> > ["Kippels at hhu.de","julian.kippels at hhu.de"]
> > 
> > it used to be that I got a vacation response if I sent a mail to
> > kippels at hhu.de and Kippels at hhu.de. Now I only get a response for
> > Kippels at hhu.de, not for kippels at hhu.de.
> > I cant say for sure, but I suppose this behaviour changed with the
> > update. If not, why could this have happened? And in any case, how
> > can I enable case insensitivity?
> >   
> 
> I took a look at the RFCs.  It appears that this change is not in
> accordance with the relevant standards.  SIEVE says 'the
> "i;ascii-casemap" comparator (which treats uppercase and lowercase
> characters in the US-ASCII subset of UTF-8 as the same).  If left
> unspecified, the default is "i;ascii-casemap".'
> https://tools.ietf.org/html/rfc5228#section-2.7.3
> 
> Since there is no mention of comparators in the Vacation RFC, it
> should fallback to case-insensitive:
> https://tools.ietf.org/html/rfc5230
> 
> You could try working around the issue by adding to your `vacation`
> statement: `:comparator "i;ascii-casemap"` -- but in any case, I'd
> file a bug about the non-standard behavior.
> 
> 
> V/r,
> James Cassell
> 
> 
> > Thanks
> > Julian
> > 
> >  

Unfortunately adding the :comparator statement to vacation results in
an error while compiling the script:

managesieve: line 5: error: unknown tagged argument ':comparator' for
the vacation command (reported only once at first occurrence).

Since https://www.dovecot.org/bugreport-mail states that bugs should be
reported to this mailing list, please consider this a bug report.

Obligatory information as follows:
doveconf -n can be found at https://pastebin.com/pjxFNfWr
Dovecot and Pigeonhole version 2.3.7.2 installed from repo.dovecot.org
on CentOS 7.

Kind Regards
Julian