Problem solved. I found a .emacs-mail-crash-something which caused the mess
(thank heaven (St Egnusius?) for the message buffer!)
Sorry.
"Bjørn Harbo" <bharbo@online.no> skrev i melding
news:clnpc6$vh9$1@quimby.gnus.org...
> I have tried to convert from mutt to gnus (5.10) and have renamed my old
> Mail-directory to avoid confusion.
> My very basic ~/.gnus:
> (setq gnus-select-method '(nntp "news.online.no"))
> (setq user-mail-address bharbo@online.no)
> (setq user-full-name "Bjorn Harbo")
> (setq gnus-secondary-select-methods
>     '((nnml "private")))
> According to http://zez.org/article/articleprint/38/ I then
> echo "testmail" | mail -s "testmail" myname
> When trying to fire up gnus the following message shows up:
>
> Error, unknown mail format! (Possibly corrupted buffer ' *nnmail
> incoming*'.)
>
> Anybody got an idea?
>
>