Re: gnus INBOX housekeeping, kept (copies of) mail lying around

[CHENG Gao]

*On Tue, 05 Jan 2016 12:04:25 +0100
* Also sprach Gijs Hillenius <gijs@hillenius.net>:

> Doing some Gnus imap folders housekeeping this morning, I found that
> 8000 messages (called 131940.  131941. etcetera) /hiding/ in the imap's
> INBOX. It looks like these are all emails that I've 'deleted' in Gnus,
> so they don't show. But for some reason they're not actually deleted.
>
> Is this a setting I messed up? I recall there used to be such a feature,
> but I don't remember what that was called. I've been searching the
> manual for this, so far without the result I hoped to find.
>
> I would appreciate a few hints.

gnus-group-expunge-group? Or maybe set nnimap-expunge to t.