This file is indexed.

/etc/logcheck/ignore.d.server/imp4 is in logcheck-database 1.3.16.

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

The actual contents of the file can be viewed below.

1
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ .+\[[0-9]+\]: \[imp\] Login success for [@._[:alnum:]-]+ \[[.0-9]{7,15}\] to \{[._[:alnum:]-]+:[0-9]+\} \[on line [0-9]+ of ".+"\]$