Kmail "Send to mailing list": automatic recipient

I have a Kmail folder Suse-linux-e where I keep messages from this group. I can get messages routed there automatically -- that's not a problem. But if I set that folder as current and use the "send to mailing list" function, I'd like to have the destination (suse-linux-e@suse.com) filled in automatically. This happened at one time in the past but it doesn't happen now. The folder properties don't seem to have anything relevant to this. Paul