This file is indexed.

/etc/logcheck/ignore.d.server/imapproxy 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.

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^\w{3} [ :0-9]{11} [._[:alnum:]-]+ in.imapproxyd\[[0-9]+\]: LOGOUT: '"[_[:alnum:]-]+(@[-_.[:alnum:]]+)?"' from server sd \[[0-9]+\]$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ in.imapproxyd\[[0-9]+\]: LOGIN: '"[_[:alnum:]-]+(@[-_.[:alnum:]]+)?"' \([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}:[0-9]+\) on (existing|new) sd \[[0-9]+\]$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ in.imapproxyd\[[0-9]+\]: Expiring server sd \[[0-9]+\]$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ in.imapproxyd\[[0-9]+\]: Raw_Proxy\(\): Failed to read line from client on socket [[:digit:]]+$