This file is indexed.

/etc/courier/smtpaccess/default is in courier-mta 0.66.1-1ubuntu4.

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
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
# Copyright 1998 - 1999 Double Precision, Inc.  See COPYING for
# distribution information.
#
# Default access policies for courieresmtpd
#
# By default, enable relaying for localhost.

127.0.0.1	allow,RELAYCLIENT


# Also, enable relaying for 10.0.0.0/8 and 192.168.0.0/16

10	allow,RELAYCLIENT
192.168	allow,RELAYCLIENT

# Use the following entry to deny connections from bad IP addresses
#
# 192.168.5	deny

# Another way to block mail from IP addresses is by initializing the
# BLOCK variable to a non-empty value.  This is enforced in submit.
#
# 192.168.5	allow,BLOCK="550 Shoo! Go away!"

# If 192.168.2.3 is listed in a blocklist that initializes the BLOCK
# environment variable, and you wish to whitelist the IP address, just
# set BLOCK to an empty value, like this:
#
# 192.168.2.3	allow,BLOCK