Sending mail when plugged and unplugged

[Pavel@Janik.cz (Pavel Janík ml.)]

Hi,

some time ago I reported the problem with posting-styles and Gnus
agent. Here it is again. My posting-styles looks like:

(setq gnus-posting-styles
      '((".*"
         (signature-file "~/.Emacs/Signatures/Signature-SuSE-Linux")
         (name "Pavel Janík ml.")
         (address "Pavel.Janik@suse.cz"))
        ("^Incoming"
         (signature-file "~/.Emacs/Signatures/Signature")
         (organization nil)
         (address "Pavel@Janik.cz"))
        ...

My user-mail address is customized to

 '(user-mail-address "Pavel.Janik@suse.cz")

Now I'm going to unplugged and send some simple mail from Incoming group to
my account on my own machine. Then, it is simply send with J J and J S. So
it should use my private posting-style, ie. Pavel@Janik.cz. It is saved
with this header (unnecessary things removed):

>From Pavel.Janik@suse.cz  Wed Jan 17 22:57:04 2001
Return-Path: <Pavel.Janik@suse.cz>
Delivered-To: pavel@snowwhite.suse.cz
From: Pavel@Janik.cz (Pavel =?iso-8859-2?q?Jan=EDk?= ml.)
Sender: Pavel.Janik@suse.cz

So only "From:" header is set to correct Pavel@Janik.cz. "From " header
contains another address, Return-path is bad and finally, there is Sender:
even if I have (sender . disabled) in message-syntax-checks.

When I'm plugged and send the same mail from the same group, it is stored
to my private mailbox as:

>From Pavel@Janik.cz  Wed Jan 17 22:57:36 2001
Return-Path: <Pavel@Janik.cz>
From: Pavel@Janik.cz (Pavel =?iso-8859-2?q?Jan=EDk?= ml.)

So it is correct and does not reference user-mail-address nor other
posting-style values.

What I expected was that even when unplugged, it will be sent with the
correct headers. What do you think about it? Is it so special?
-- 
Pavel Janík ml.
Pavel@Janik.cz
http://www.janik.cz