Insights on getting mailing lists un-blacklisted for gmail?

Hi all, The oVirt users mailing list has ~200 people subscribed from a gmail address. Apparently, because some people were marking the mailing list posts as spam, the list is now automatically blacklisted for all gmail.com users - we have received "this email was rejected" messages for over 180 users, who are thus not receiving list email any more. I have no idea how to fix this, gmail docs are poor to say the least on this topic, and there doesn't seem to be anywhere for me to appeal. Anyone gone through this and solved the problem elsewhere? Any insights? Thanks, Dave. -- Dave Neary - Community Action and Impact Open Source and Standards, Red Hat - http://community.redhat.com Ph: +33 9 50 71 55 62 / Cell: +33 6 77 01 92 13