Trying to remove a "X-Authentication" part in a outgoing header..

[Jorgen Skogstad <jskogsta @ trd . sdata . no>]

Kindest,

I have a small thing I would like to do... I get the following entry
in each header of all messages outgoing:

X-Authentication-Warning: server.mydomain.com: bin set sender to 
user@mydomain.com using -f

I've tried several ways to remove this.. but can't seem to find the
correct one. ;) Have anyone got any small tips? 

I would like to thank you who put out the anon.pl script.. Worked
like a charm. ;)

Kindest,
Jørgen Skogstad