lmtp_save_to_detail_mailbox override

[Andreas Thienemann via dovecot]

Hi,

I have a dovecot 2.3.2.1 instance running here that is getting userdb and 
passdb data from a SQL database. This was a cyrus server migrated over and 
all users are happy.

All users except one: Said user asked if it would be possible to disable 
subaddressing (localuser+fol...@example.com) again.

The setting controlling that is AFAIK the lmtp_save_to_detail_mailbox 
item.

My idea was to override that setting for the specific user. I changed the 
user_query to return no for the user in question and all seems well:

# doveadm user test
field   value
user    t...@example.com
uid     vmail
gid     vmail
home    /var/lib/imap/example.com/test
mail    mdbox:/var/spool/imap/user/example.com/test
lmtp_save_to_detail_mailbox     no
#

Looks good, doesn't work though. Mail is still delivered to the +folder. 
Is this per user setting not taken into account?

I could probably provide the user in question with a sieve script that 
files everything into the INBOX again but I wonder if there's a better 
way?

cheers,
 Andreas