/etc/news/expire.ctl is in inn2 2.5.2+20110413-1build1.
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 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | ## $Id: expire.ctl 8575 2009-08-18 13:53:54Z iulius $
##
## Sample configuration file for article expiration.
##
## Format:
## /remember/:<keep>
## <class>:<min>:<default>:<max>
## <wildmat>:<flag>:<min>:<default>:<max>
##
## First line gives history retention; second line specifies expiration
## for classes; third line specifies expiration for group if groupbaseexpiry
## is true in inn.conf.
## <class> Class specified in storage.conf.
## <wildmat> Wildmat-style patterns for the newsgroups.
## <flag> Status of the newsgroups.
## <keep> Number of days to retain a message-ID in history.
## <min> Minimum number of days to keep the article.
## <default> Default number of days to keep the article.
## <max> Flush the article after this many days.
## <keep>, <min>, <default> and <max> can be floating-point numbers or the
## word "never". Times are based on the arrival time for expire and expireover
## (unless -p is used; see expire(8) and expireover(8)), and on the posting
## time for history retention.
##
## See the expire.ctl man page for more information.
## When an article is rejected or expires before 10 days, we still remember
## it for 11 days from its original posting time in case we get offered it
## again. See the artcutoff parameter in inn.conf; it should match this
## parameter (/remember/ uses 11 days instead of 10 in order to take into
## account articles whose posting date is one day into the future).
/remember/:11
## Keep for 1-15 days, allow Expires: headers to work. This entry uses
## the syntax appropriate when groupbaseexpiry is true in inn.conf. Times
## are based on the arrival time (unless -p is used).
*:A:1:15:never
## Keep for 1-15 days, allow Expires: headers to work. This is an entry
## based on storage class, used when groupbaseexpiry is false. Times
## are based on the arrival time (unless -p is used).
#0:1:15:never
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