IMAP extensions needed for SPAM/HAM and WHITE/BLACK listing

I would like to suggest that IMAP extensions could usefully be  
specified to permit MUA to signal to the MS over IMAP, that the  
message in question is, or is not spam. I would also like to suggest  
that an IMAP extension pair to signal that the specified address is to  
be white, or black listed, would be equally useful.

This is because a large number of people now depend on IMAP backed MS  
in places like google, or corporate maildrops, but also have in-client  
spam tagging. Where the spam filtering is not sufficiently complete to  
prevent significant leakage, and mis-attribution across the MUA/MS  
dialogue, the lack of an in-protocol method to pass the information  
means we are all using what I would call ad-hoc methods to fix this  
situation up.

If it was possible to communicate this 'first class' in IMAP, I think  
that it would significantly enhance the user experience.

As an example, at the moment if I wish to inform google that I have  
known spam in local folders, I have to go to the web interface and  
manually tag. If there was an IMAP extension, I could review my local  
baysian junk folder, remove all non-spam (and flag the senders as  
white-listed if need be), and request the rest to be flagged as spam  
back on the IMAP backed MS.

Likewise for false positives and blacklisted senders.

I am told that the IMAPEXT WG is closed. I mail this, in the hope that  
somebody can help decide if this is a viable topic for consideration.

Many thanks for guidance and advice thus far from Lisa Dusseault.

cheers

-George