April 25, 2015
7:43 p.m.
Mark Sapiro writes:
As I said before, this is reported as a bug <https://bugs.launchpad.net/mailman/+bug/1447445> which is "fixed" for the next release, and which fix has been installed for the mail.python.org Mailman.
Note that the RFC-ly correct fix would involve a reverse lookup, which is expensive. And I wouldn't be surprised if that failed too for many configurations in practice.