>>>>> Gabor Z. Papp wrote:

> Thanks, seems like ok.

Thank you for verifying it.

> Only one problem left, earlier with the code below I was able to
> mark more articles and pipe them one by one in batch:

> (defun gzp-pipe-spam (&optional n)
>   (interactive "P")
>   (let* ( (pipe (format "cat | /path/to/cmd"))
>          )

>     (save-excursion
>       (dolist (article (gnus-summary-work-articles n))
>        (gnus-summary-goto-subject article)
>        (gnus-summary-show-raw-article)
>        (gnus-summary-save-in-pipe :decode nil)
>        (gnus-summary-save-in-pipe pipe)
>        (gnus-summary-show-article)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ Isn't it unnecessary?
>        )))
>   (gnus-summary-expand-window))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ That's a good idea.

> The current code does only one article even I mark more.
> I can't fix it, could someone help? :-)

Ok.  Could you try this one?