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@hhu.de","julian.kippels@hhu.de"]
it used to be that I got a vacation response if I sent a mail to kippels@hhu.de and Kippels@hhu.de. Now I only get a response for Kippels@hhu.de, not for kippels@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