This file is indexed.

/etc/logcheck/violations.ignore.d/courier-pop is in courier-pop 0.78.0-2ubuntu2.

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:]-]+ courierpop3login: Unexpected SSL connection shutdown\.$^\w{3} [ :0-9]{11} [._[:alnum:]-]+ pop3d: Unexpected SSL connection shutdown\.$