/etc/logcheck/violations.ignore.d/cyrus-imapd is in cyrus-common 2.5.10-3ubuntu1.
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 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/(lmtp|lmtpunix)\[[0-9]+\]: IOERROR: fstating sieve script [/a-zA-Z^]+/defaultbc: No such file or directory$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/lmtpunix\[[0-9]+\]: WARNING: sieve script %s doesn't exist: [/a-zA-Z^]+/defaultbc: No such file or directory
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/(imaps?|pop3s?|lmtp|lmtpunix)\[[0-9]+\]: SQUAT failed to open index file$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/(imaps?|pop3s?|lmtp|lmtpunix)\[[0-9]+\]: SQUAT failed$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/(imaps?|pop3s?|lmtp|lmtpunix)\[[0-9]+\]: DBERROR db[34]: [0-9]+ lockers$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ cyrus/(imaps?|pop3s?)\[[0-9]+\]: (START)?TLS( negotiation)? failed:
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