Gnus stopped working with gmail

[Thorsten Jolitz <tjolitz@gmail.com>]

Hi List, 

since yesterday my gnus stopped working with gmail, although I did
nothing (like updating or so, except the usual Archlinux pacman
updates) that might have caused that sudden failure.

Gnus still works fine with all my (gmane) newsgroups. Gmail works fine
when accessed via Google's web-interface. But in Gnus I see:

,----
| Warning: Opening nnimap server on foo ...failed
`----

messages and this in the *Server* buffer:

,----
| [...]
| {nntp:news.gmane.org} (opened)
| {nnimap:foo} (denied)
| {nnimap:bar} (denied)
| [...]
`----

I found http://www.emacswiki.org/emacs-en/GnusAuthinfo and tried 

,----
| M-x netrc-parse
`----

on my .authinfo but it returned nil. 

I once had the problem that Google apparently saw Gnus as a bot or so
and had me login manually at the web-ui to show that I'm human, but at
that time I got an error-message, now I cannot find any message or log
with a hint whats going on.

I did restart my machine, emacs and gnus since this happened, to no
avail. 

So any hints would be welcome. 

PS

#+BEGIN_SRC emacs-lisp
(emacs-version)
#+END_SRC

#+results:
: GNU Emacs 24.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.12.2)
:  of 2014-06-11 on var-lib-archbuild-staging-x86_64-jgc


#+BEGIN_SRC emacs-lisp
(gnus-version)
#+END_SRC

#+results:
: Gnus v5.13


-- 
cheers,
Thorsten