op 10-06-14 17:15, Bernd Petrovitsch schreef: > ---- snip ---- > in every mail header (=> RFC-2919). > Is someone filtering headers on your side or the MUA just not displaying > really all of them? > I'm using Thunderbird as MUA. I'll look at the messages on the server. Never noticed before there was something missing. Thanks, Koenraad.