News messages showig up under "Mailing Lists", Spam in Inbox

[Zak McKracken]

Since I moved my opera mail directory to another machine (which already
had one IMAP account and some newsgroups installed), I have the following
two problems:

New Messages from Gmane show up under "Mailing lists", as if I had
subscribed to the corresponding mailing list, which I haven't (I happen to
completely dislike mailing lists, and I value newsgroups a lot). This
happens only if I read them! I.e: I see new messages in the newsgroup, I
click on one thread, and the thread shows up in the corresponding mailing
list. (Example: I'm reading
gmane.comp.documentfoundation.libreoffice.user, click on one message, and
in the mail tab under "mailing lists" appears a new entry
"users.libreoffice org", which contains the thread this message belongs
to, and the mailing adress is correctly set to "us...@libreoffice.org".
Is this something that the newsgroup host can do? Or is it a malfunction
of Opera? Or a feature that can be turned off? Or is this some feature of
gmane? (in that case: sorry for asking gmane-related questions here)
This does not happen if I read the opera news.

Second, similar and also annoying: Every e-mail that is marked as Spam
still shows up in my inbox! And my "unread" folder, and so on. It is being
treated just like a regular mail, except for the icon it gets. This is not
how I think this should work (and it didn't before the move).

Oh, and third: I have three POP3 e-mail accounts. Each gets a small space
in the mail tab, which displays the amount of unread messages. Fine. If I
click on them, they expand and give me a "sent" and "inbox" folder, which
is nice. Problem: New received mails are never shown in these folders,
even if the headline tells me there are new mails. I can go to the
"global" inbox and see them, no problem, but in the tab for the single
accounts, it appears as if I got no new messages since March. I can
actually live with this, but it should not be, still.

My guess is that this all happened while importing the mail from the other
opera installation, because that is also when the mails stopped appearing
in the account-specific inboxes.
And by the way: I was not happy to see that importing mail from another
"mail" folder will not use the sorting from there. Had to set up all
necessary views and sort the mail by hand.

Regards,
Zak