Is possible to override Dovecot variables or Sieve env vars and extdata lookups

[Aki Tuomi]

On 19.03.2018 09:04, MRob wrote:
> On 2018-03-19 06:31, Aki Tuomi wrote:
>> On 19.03.2018 06:40, MRob wrote:
>>> Are the dovecot environment variables mutable? I'd like to override
>>> like:
>>>
>>> set "${env.vnd.dovecot.username}" "someuser at example.org"
>>>
>>> Or better, I prefer to override %u Dovecot variable during the userdb
>>> lookup.
>>>
>>> Is either possible?
>>>
>>> PS, when Sieve does extdata lookups for username key, where does
>>> username come from? %u?  Does an override as above change the dict
>>> lookup key for extdata?
>>
>> You could override the %u variable, but overriding it in userdb will
>> have surprising consequences. Basically this amounts to same as changing
>> username for the user.
>
> This is useful to work with a older system in my case, username should
> seem as a new one anyways. I accept the consequence. :)
>
> I tried return only "u" in the passdb and usedb lookup (also
> "userdb_u") but it did not work. Where can I override %u? Can I do it
> in both passdb and userdb lookup?

https://wiki.dovecot.org/PasswordDatabase/ExtraFields/

Aki