This file is indexed.

/usr/share/shorewall/macro.Submission is in shorewall 5.0.4-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#
# Shorewall - Submission Macro
#
# /usr/share/shorewall/macro.Submission
#
#	This macro handles mail message submission traffic.
#
###############################################################################
#ACTION	SOURCE	DEST	PROTO	DEST	SOURCE	ORIGIN	RATE	USER/
#				PORT(S)	PORT(S)	DEST	LIMIT	GROUP
PARAM	-	-	tcp	587