On Thu, 25 May 2017 17:29:00 -0700 (PDT) John Hardin wrote: > On Thu, 25 May 2017, RW wrote: > > > Actually it does look like there is another problem. This is another > > Thunderbird header from this list with the same format: > > > > Message-ID: <[email protected]> > > > >>> header __MOZILLA_MSGID MESSAGEID =~ > >>> /^<[A-F\d]{8}\.[A-F1-9][A-F\d]{0,7}\@\S+>$/m > >>> > >>> Message-ID: > >>> <[email protected]> > > So it looks like Mozilla has changed Message-ID values from 8hex.8hex > uppercase-only to a lowercase GUID. That's a simple enough change to > make to that rule.
The pattern seems to be consistently 8-4-4-4-12. It looks like old versions of Aqua Mail had User-Agent headers that started with Mozilla, with its own Message-Id format. This wont cause FPs on new mail, but it may affect the stats on corpora that contain ham that's more than a year old.
