Catching messages to Majordomo, itself

[Lou Katz <lou @ metron . com>]

I have just moved a bunch of mailing lists from one domain to
another. It wasn't hard to catch submissions to the list and have
them bounced back to the submitter with a message that the list
had moved (I hacked the 'new-list' script to do this). However,
there are still subscribe and unsubscribe messages that arrive, and
they go to Majordomo, not the list.

Any suggestions how to trap these and bounce them back with info on
where the list has moved to?

Thanks

-=[Lou Katz]=-