On 29 Nov 2015, at 19:00, Peer Heinlein <p.heinl...@heinlein-support.de> wrote: > >> It would probably also be useful to add support for removing a >> field entirely, such as returning "-proxy" (where the =value would >> be ignored). I'm not entirely sure how useful that would be >> though. > > Why don't just enable > > override_fields = proxy= > > so, just use "attribue=<nothing>" to delete it?
There could be some settings which are wanted to be explicitly cleared. For example in dovecot.conf have "mail_plugins=foo" while in passdb it could be disabled with "mail_plugins=". There are probably some better examples.
