/etc/logcheck/violations.ignore.d/courier-pop is in courier-pop 0.66.1-1ubuntu4.
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\.$
|