The code I tried was:
warn condition = ${if exists{/home/$local_part/.forward-disable}{yes}
{no}}
add_header = X-forward-disable: yes
log_message = forwarding disabled for $local_part $home
The problem is that the header always get set even when the file doesn't
exist, but the log entry doesn't appear in the log file
--
Gary Stainburn
Group I.T. Manager
Ringways Garages
http://www.ringways.co.uk