Outlook posting?

I've carefully read every file in /doc and most if not all man pages, and i
still can't solve this one. So i'm turning to this list... sn is up and
running with one local group, which i can post to. Only it half-works.
Outlook express and PAN both can post on the group, but will report and
error "Posting failed, error posting, etc". But the post itself did get
through to the news spool.

Is there a reason for this? Bug? Compatibility problem? Weird values?

I'm running sn on Gentoo Linux under inetd (xinetd)

Laurent