/etc/exim4/conf.d/transport/30_exim4-config_address_pipe is in exim4-config 4.82-3ubuntu2.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | # This transport is used for handling pipe deliveries generated by
# .forward files. If the commands fails and produces any output on standard
# output or standard error streams, the output is returned to the sender
# of the message as a delivery error.
address_pipe:
debug_print = "T: address_pipe for $local_part@$domain"
driver = pipe
return_fail_output
|