[Mailman-Users] Tips in using a list addr for another lists's owner address?

[Matt England]

I have a webmaster at lists.mydomain.com email list address that I use as the 
address of the owner of other lists at lists.mydomain.com.

This seems to work exactly as I intended (I can have a floating and/or 
group responsibility for the mydomain.com webmaster), except that I get a 
lot of messages like this sent to webmast at lists.mydomain.com:

From: mailman-bounces at lists.mydomain.com on Sun Jan 15 14:12:04 2006
Subject: svn-notify subscription notification
Cause: Message has implicit destination

...presumably due to subscribe notices from the other email lists.

I haven't investigated this yet, but I thought I'd first ask this 
group:  how can I eliminate/minimize these "Message has implicit 
destination" administrative notes?

-Matt