Comment 7 for bug 198368

I'm raising the importance because it's now clear that this is blocking mailing lists on production. All the mailman side issues appear to have been fixed with the latest cherry picks, but because this bug is happening in xmlrpc-private, LP is not being informed by mailman that all is well. We are going to have to cowboy in some changes to Zope to improve the logging and then figure out what's going on from there.