IMS5.1 copy all outgoing mail to one mailbox

Hi,I'd be interested in doing this for everything that comes into and leaves the message store.I wonder if you could do it by adding a parameter to one of the channels. Does anybody know?

Could you use an mta wide sieve filter that would forward a copy and keep a copy in the imap folder?i.e.If you want to keep a copy on the imap-server you can specify an explicit keep:redirect "archive@somewhere.else.com";keep;

I tried this and i get 8 copies of each mail in the destination mailbox.I guess the filter gets applied to all channels.How do i attach this filter to one channel only.