Comment 19 for bug 2056372

That could be a possibility.

On a side note, I tried to setup a testbed to reproduce this (and start working on a dep8 test) and can't seem to get the setup working correctly. I followed the steps in bug #1998678, see the mail in `/var/mail/ubuntu` but don't see any Received-SPF headers at all, is that expected? I think I must be missing something in my setup.