[Mimedefang] action_delete_all_headers

[Marco Supino]

Hi,

I want to use the action_delete_all_headers to remove a specific header 
from emails, but i want this to run only on "outgoing" emails, i already 
have in filter_relay a check for outgoing emails, which makes it ignore 
scan of outgoing emails, but this action can only be used in 
filter_begin or filter_end (said in the MAN),

How can i use this action to delete the header i want only from outgoing 
emails ? neither of these filters get an IP as a argument i can use to 
decide when to run it.

I am quite new to Mimedefang, so i hope i make sense, and dont miss 
something simple.

Thanks.

Marco.