I've been away from Notes for a few years, and I thought I remembered Notes being smart enough to avoid sending duplicate messages when a single person is mentioned explicitly AND listed in a group. In otherwords, I'm a member of SomeEmailGroup, and Joe User sends a message in which I'm listed in the To: field and SomeEmailGroup is listed in the Cc: field, and I get two messages.
Do I have to just live with this, or is there a way around it? Does this suggest some misconfiguration somewhere?
(A possible clue is that one of the messages always includes MIME parts and one doesn't. I thought this might mean the group might list internet-style addresses rather than Notes hierarchical names, but it does not.)