/etc/exim4/conf.d/transport/30_exim4-config_maildrop_pipe is in exim4-config 4.76-3ubuntu3.4.
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 | maildrop_pipe:
debug_print = "T: maildrop_pipe for $local_part@$domain"
driver = pipe
path = "/bin:/usr/bin:/usr/local/bin"
command = "/usr/bin/maildrop"
return_path_add
delivery_date_add
envelope_to_add
|