I've noticed that I'm getting two copies of some BitBucket issue notifications.  The first is from trac@einsteintoolkit.org because I am subscribed to that mailing list, and all the issue notifications go to it.  The second is directly from BitBucket, and it is sent because I have interacted with an issue, so BitBucket assumes I am interested and "watches" the issue for me.  

I think the solution is to unsubscribe from trac@einsteintoolkit.org and instead enable issue notifications from the tickets repository in bitbucket.  

Given this situation, is there still value in having trac@einsteintoolkit,org?  I would imagine that people who want to see *all* ticket activity from the ET project will likely have a bitbucket account so they can interact with the code, and hence can enable direct bitbucket notifications.