/etc/logcheck/ignore.d.server/sendmail is in sendmail-base 8.15.2-8.
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 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | ^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: starting daemon
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: restarting
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: rejecting connections on daemon
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: accepting connections again for daemon
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* User unknown
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: alias database .* rebuilt
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* aliases, longest
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .*: from=
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .*: split:
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* lost input channel
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* message-id=
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* return to sender
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* stat=
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .* timeout waiting
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .*: Milter: data, discard
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: .*: discarded
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: AUTH=
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: (PLAIN|CRAM-MD5|DIGEST-MD5) set secret
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: DIGEST-MD5: failed .* later in exchange
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: STARTTLS=(server|client), .* verify=(OK|NO)
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: no secret in database$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: [[:alnum:]]+: [[:alnum:]]+: DSN: Return receipt$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: [[:alnum:]]+: collect: premature EOM: unexpected close$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: [[:alnum:]]+: collect: unexpected close on connection from (\[[0-9.]+\]|[._[:alnum:]-]+), sender=<[^>]+>$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: DIGEST-MD5 (server|client) step [[:alnum:]]+$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: [[:alnum:]]+: Milter (add|change|delete|message).*: .*$
^(\w{3} [ :0-9]{11}|([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{6})?\+[0-9]{2}:[0-9]{2})) [._[:alnum:]-]+ (sendmail|sm-(mta|msp|que))\[[0-9]+\]: [[:alnum:]]+\[[0-9]+\]:.*$
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