Teemu Likonen [2015-10-14 17:44:37+03] wrote:

> I'm confused about Gnus's mail-splitting back-ends. How does Gnus
> decide which back-end to use?

I think I got it. Mail back-ends have get-new-mail variable and if it's
non-nil then that back-end fetches mail from mail-sources and possibly
splits mail to different groups within that back-end. I think this
should be made clear in the Gnus manual.