Debugging msmtp in gnus

[Thomas Bach]

Hi folks,

copying my gnus and emacs setup to another computer did break up some
things.

Getting eMail is fixed now, org-mode still won't work and *argh*
eMails aren't sended.
But hacking around for hours didn't solve nothing, neither did
google.

What steps can I do to debug this?

-msmtp is working smooth on command-line (version 1.4.7)
-Gnus (v5.11) is configured as follows:
##################################################
(setq sendmail-program "/usr/bin/msmtp")
(setq smtpmail-debug-info t)
(setq smtpmail-debug-verb t)

(setq gnus-posting-styles
      '((".*"
         (name "Thomas Bach")
         (address "bachth@uni-mainz.de")
         (eval (setq message-sendmail-extra-arguments '("-a" "bachth")))
         (user-mail-address "bachth@uni-mainz.de"))
         ;; .... ))
##################################################
(of course there is some more, but anyway)

-emacs-version: 22.2.1

The whole thing is running in an Ubuntu setup.

Any suggesions?

I'd really like to have a feature like:
toggle-some-switch
-> The build `sendmail`-cmd-line is in my *Messages* buffer. With all
the output it generated.
The above smtpmail-debug-* doesn't some to do nothing.

Greets,
        Thomas.