Am 17.10.2014 um 16:01 schrieb Daniel Corbe <corbe@corbe.net>:

Generally, the proper way is to identify mails from mailing lists by their
List-ID header, which, as i checked now, is missing here and should be
added.

This. 100%

I second this; so I can finally filter the bird emails correctly (and not per

To/Cc/Bcc, which doesn't work in some cases).

Stefan