/usr/share/shorewall/macro.IMAP 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.
1 2 3 4 5 6 7 8 9 10 11 12 | #
# Shorewall - IMAP Macro
#
# /usr/share/shorewall/macro.IMAP
#
# This macro handles plaintext IMAP traffic. For encrypted IMAP,
# see macro.IMAPS.
#
###############################################################################
#ACTION SOURCE DEST PROTO DEST SOURCE ORIGIN RATE USER/
# PORT(S) PORT(S) DEST LIMIT GROUP
PARAM - - tcp 143
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