On Tue, 14 Oct 2014 10:44:51 +0200 Axb wrote: > > have you verified that some of these are not included? > > X-Originating-IP will not be included as it can be used to help > detect ham or spam
It's really no different to other headers you are ignoring. In particular X-Delivered-To can be very useful to Bayes when users have multiple addresses.
