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INN
InterNet News
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Introduction to INN (1)
Originally written by Rich Salz
• ISC took over development in 1996
• http://www.isc.org/software/inn
INN is a complete Usenet system
• innd – NNTP server, main program, inbound receiver
Exchange news articles with peers
innfeed: outbound, feed articles to peers
• nnrpd – NNTP reader server
• Separate readers and peers
For readers: readers.conf
For peers: incoming.conf、innfeed.conf、newsfeeds
• A lot of components…
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Introduction to INN (2)
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Introduction to INN (3)
Main configuration
• inn.conf
Components
• innd – main daemon for peers (and users)
incoming.conf
• innfeed – NNTP feeder
innfeed.conf、newsfeeds
• nnrpd – for users
readers.conf
• Newsgroups database
active、active.times、newsgroups、history
• Overview database
buffindexed.conf、ovdb.conf、overview.fmt
• Spool
storage.conf、cycbuff.conf
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Introduction to INN (4)
Specific functions
• Article and history expiration
expire.ctl
• Handling of control messages
control.ctl
• Submission addresses for moderated groups
moderators
• Cron jobs
news.daily
• Summery of INN log files
innreports.conf
• Others
…
INN Installation
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Install INN (1)
In FreeBSD ports
• news/inn: INN 2.4.6
• 2009-06-08 - INN 2.4.6 was made EOL by the release of 2.5.0.
• 2010-Mar-25 - INN v2.5.2 , ISC is pleased to announce a new bug fixed
version of INN 2.5
How to install INN 2.5.2?
• Tarball: ftp://ftp.isc.org/isc/inn/inn-2.5.2.tar.gz
• Dependencies: “Requirements” in http://www.eyrie.org/~eagle/software/inn/
C compiler gcc: built-in
Perl and MIME::Parser: lang/perl5.8+、mail/p5-MIME-Tools、graphics/p5-GD
GNU make: devel/gmake
GnuPG: security/gnupg
Berkeley DB: databases/db47+
Yacc implementation: devel/bison
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Install INN (2)
http://www.eyrie.org/~eagle/software/inn/docs-2.5/checklist.html
http://www.eyrie.org/~eagle/software/inn/docs-2.5/install.html
Set up account „news‟
Set up the home directory for „news‟
• # mkdir –p /home/news && chown news:news /home/news
• You *CANNOT* chown -R news:news after installing. Some bins are SUID root.
Login as „news‟
• su - news / sudo -u news …
• rlogin –l news localhost
Enable rlogind via inetd, and set ~news/.rhosts
– localhost username
news:*:8:8::0:0:News Subsystem:/home/news:/bin/tcsh
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Install INN (3)
The source
• Fetch the tarball and put it in /tmp by fetch or wget(ftp/wget)
• Extract it: tar xzf inn-2.5.2.tar.gz
Configure
• ./configure --help
--prefix=$HOME
--with-http-dir=$HOME/public_html
--enable-largefiles cannot be used with --enable-tagged-hash
--enable-keywords
--with-perl
--with-berkeleydb=/usr/local
• You can copy some environment variables from ports/news/inn
make -n CONFIG_DONE_INN=1
/usr/ports/news/inn/work/.configure_done.inn._usr_local
CC, CFLAGS, CXXFLAGS, LDFLAGS
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Install INN (4)
After configure
Modify Makefile.global
Please check the following files before running make, to ensure that everything was set correctly. Makefile.global include/config.h include/inn/options.h include/inn/paths.h innfeed/innfeed.h
## Berkeley DB support. If this support is configured, anything linking ## against libstorage also needs to link against DB_LDFLAGS and DB_LIBS. DB_CPPFLAGS = -I/usr/local/include/db47 DB_LDFLAGS = -L/usr/local/lib DB_LIBS = -ldb-4.7 –lz DBM_CPPFLAGS = -I/usr/local/include/db47 DBM_LIBS = -L/usr/local/lib -ldb-4.7
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Install INN (5)
Compile INN
• $ gmake (make)
Install INN
• Login as „root‟
• # gmake (make) install
To upgrade INN
• # gmake (make) update
upgrade binaries, scripts, and manual pages, but not config files
Be sure to configure INN with the same options that was used previously.
Finally
• Create mail alias for usenet@ (which is defined in --with-news-master)
• Set .tcshrc
setenv PATH $HOME/bin:$PATH setenv MANPATH $HOME/share/man:`manpath`
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Install INN (6)
Set up syslog
• In /etc/syslog.conf
$ cd ~/log && touch news.crit news.err news.notice
# cd /var/log && ln –s ~news/log news
# /etc/rc.d/syslogd reload
Log rotate
• Done by news.daily, which is triggered by cron
# uncomment these if you're running inn news.crit /var/log/news/news.crit news.err /var/log/news/news.err news.notice /var/log/news/news.notice
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Install INN (7)
Set up cron jobs
• crontab for „news‟
• $ crontab –e
news.daily
• If you're using any non-CNFS storage methods, add delayrm to the above
option list for news.daily.
~news/log/expire.rm
expirerm file
rnews
• Processing spooled messages to the server again
0 3 * * * ~news/bin/news.daily expireover lowmark
0 3 * * * ~news/bin/rnews -U
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Install INN (8)
Copy start-up script from news/inn/files/innd.sh.in
• Put it in /usr/local/etc/rc.d/innd
• Modify „%%VAR%%‟s
%%PREFIX%% ~news (/home/news、/usr/local/news、…)
%%DBDIR$$ ~news/db
%%NEWSBASE%% ~news
• # chmod 555 /usr/local/etc/rc.d/innd
Modify /etc/rc.conf
A lot of configurations remain…
innd_enable=“YES”
INN Databases
~news/db/
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active (1)
List the newsgroups carried by INN.
• Maintained using ctlinnd or control messages
• Edit it directly: active.times, overview database
Format
• Each newsgroup is listed only once
• Each line specifies one newsgroup
• Four fields separated by a space:
<name> <high> <low> <status>
cs.test 0000003681 0000000285 y
• name: junk、control*
• high is the highest article number ever seen
• low is not guaranteed to be accurate, and should only be taken to be a hint.
Normally updated nightly as part of the expire process
• If the lowest article number is greater than the highest article number, then
there are no articles in the newsgroup.
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active (2)
Format
• status:
y: allow posting and feeding
m: moderated, all posting must be approved
n: allow feeding only
j: fed articles are filed in junk group
x: disallow posting and feeding
=foo.bar: articles are filed in the newsgroup foo.bar
Get a close to complete newsgroups database file
• ftp://ftp.isc.org/pub/usenet/CONFIG/
• active、newsgroups
tw.bbs.*
Big5 newsgroups for tw.bbs.*
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active.times
Provide a chronological record of when newsgroups were created on the
local server
Format
• Three fields
<name> <time> <creator>
cs.test 1128713744 [email protected]
• time: the time it was created, expressed as Unix timestamp
date -r <time>
• creator: plain text intended to describe the entity that created the newsgroup
This field should be encoded in UTF-8
Usually the e-mail address of the creator
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newsgroups
Contain a list of newsgroups and its short description
• It is not necessary that all the groups carried by the news server be listed in
the newsgroups file
• It is also not necessary that all the groups listed in the newsgroups file be
carried by the news server
If you use ctlinnd newgroup to manually create a group, only the active
file is updated
• edit newsgroups file to add a short description for the created group
Format
• Each line consists of two fields separated by at least one tab
<name>\t<description>
cs.computer-center [系計中公告] (Moderated)
Preferred format: The total line length should be at most 79 columns. The
description should start with a capital and not be more than 55 characters long
using UTF-8 for non-ASCII characters in description is recommended
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history (1)
Keep a record of current and recently expired articles
Format
• [<Hash>]\t<date>\t<token>
• [E7516D3A69051BC9712D093D52A4C67B] 1274105567~-
~1274105565 @0305414C543100000000000E92A20000025E@
• Each line corresponds to one article
• Hash: ASCII representation of the hash of the Message-ID header
• date: three sub-fields separated by a „~‟, each contains Unix timestamp
1st sub-field: arrival time of the article
2nd sub-field: „Expires:‟ header or „-‟
3rd sub-field: „Date:‟ header, record of the posting time
• token: a token of the article.
This field is empty if the article has been expired
Use sm utility to retrieve the article
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history (2)
grephistory
• Query the INN history database via Message-ID
• Output the token if the article is still on the news server
• By use of sm to retrieve the article
makehistory
• Initialize or rebuild INN history database
• Also can be used to rebuild the overview database
makehistory –FOx
Be sure to stop innd and delete or zero out the existing database
INN Configurations
~news/etc/
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Article Storage Format
The supported storage formats
• tradspool
Articles are stored as individual text files, named by the article number, and
divided up into directories based on the newsgroups name
article 12345 in cs.test would be stored as cs/test/12345
• timehash
Articles are stored as individual text files, and divided into directories based on
the arrival time.
• timecaf
Similar to timehash, but multiple articles are put in the same file
• cnfs
Articles are stored in pre-configured buffer files
• Advantages and Disadvantages
http://www.eyrie.org/~eagle/software/inn/docs-2.5/install.html#S6
• INN can support all four at the same time
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Overview Storage Mechanism
Overview is for readers
Three overview mechanisms
• tradindexed
Uses two files per newsgroup, one containing the overview data and one
containing the index
Fast for readers, but slow to write to
• buffindexed
Stores overview data and index information into buffers, which are
preconfigured files defined in buffindexed.conf, similar to CNFS buffers
Slower for readers
• ovdb
Stores overview data in a Berkeley DB database
Fast and robust, but may require more disk space
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Configration outline
Access controls
• Peers: incoming.conf、newsfeeds、innfeed.conf
• Readers: readers.conf
Storage
• cycbuff.conf、storage.conf
Overview
• ovdb.conf、buffindexed.conf、overview.fmt
Other controls
• Expiration: expire.ctl
• Moderators list: moderators
• INN report: innreport.conf
• Default subscriptions for a new client: subscriptions
• …
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inn.conf (1)
The primary general configuration file for all INN programs
• Most likely to need setting
organization: “College of Computer Science, NCTU”
– It will be filled in the „Organization:‟ header for posts
ovmethod: ovdb
– The overview mechanism
• General Settings
server: csnews2.cs.nctu.edu.tw
– Default NNTP server for nnrpd, actsync, nntpget, getlist
• Feed Configuration
pathalias: news.cs.nctu.edu.tw
– News servers within a particular organization to add a common identity
• Article Storage
extraoverviewadvertised: [ ]
Extraoverviewhidden: [ ]
– See inn.conf(5)
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inn.conf (2)
• Reading
noreader: true
– For separately running innd and nnrpd
• Posting
nntpauthsender: true
– Add „Sender:‟ header to local posts containing the identity assigned by
readers.conf
• Monitoring
doinnwatch: false
– Disable the innwatch
• Logging
docnfsstat: true
– Start cnfsstat when innd is started
logcycles: 3
– How many old logs scanlogs keeps
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incoming.conf
Specify who are permitted to connect to your host and feed it articles
• Connections from hosts not listed in this file will be rejected or be handed
off to nnrpd and checked against the access restrictions in readers.conf
Three types of entries: key/value, peer, group
streaming: true # streaming allowed by default max-connections: 8 # per feed group cs { max-connections: 16 patterns: "*,@local*" peer CSBBS { hostname: "bbs.cs.nctu.edu.tw, 140.113.168.8" } peer FREEBSD { hostname: "freebsd.cs.nctu.edu.tw, 140.113.17.209" patterns: "!*,freebsd.*,mailing.*" } } group peering { max-connections: 16 patterns: "*,@cis.*,@cs.*,@csie.*,@local*" peer NCTUPEER { hostname: "news-peer.nctu.edu.tw, 140.113.250.119" max-connections: 8 } }
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newsfeeds (1)
Determine how incoming articles are redistributed to your peers
• Organized as a series of feed entries
• Each entry is composed of four fields separated by „:‟
• 1st field: <name>/<exclude>,<exclude>,…
If you don't want a feed to receive articles from a certain source, then …
• 2nd field: <newsgroups-pattern>/<distrbution-list>
wildmat pattern matching syntax
– These are simple wildcard matches using the „*‟ as the wildcard character
– wildmat patterns can be specified in a comma-separated list
– The last pattern in the line that matches the group name is used
– Patterns beginning with ! mean to exclude groups matching that pattern
» *,!comp.*,comp.os.*
– wildmat patterns also support "poison" patterns (patterns starting with @)
» “misc.*,@misc.bar” vs. “misc.*,!misc.bar”
» For a article crossposted between misc.foo and misc.bar
» For a article posted only to misc.bar
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newsfeeds (2)
• 3rd field: comma-separated list of flags
http://www.eyrie.org/~eagle/software/inn/docs-2.5/newsfeeds.html#S2
• 4th field: multi-purpose parameter, meaning depends on the flags in 3rd field
Feeding peers via innfeed
Site settings
## Uncomment if you're using innfeed. ## Add "-y" as an option to innfeed to use the name of each feed as the ## name of the host to feed articles to; without "-y" an innfeed.conf ## file is needed. # innfeed funnel master. innfeed!\ :!*\ :Tc,Wnm*:/home/news/bin/innfeed -y
news.uu.net/uunet\ :*,!junk,!control,!control.*/!foo\ :Tm:innfeed!
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newsfeeds (3)
Other examples
• News overview used when “useoverchan: true” in inn.conf
• CS Archive-SQLite
• Mirror nctu.talk and tw.bbs.campus.nctu
# News overview. overview!:*:Tc,WnteO:/news/bin/overchan
archive_sqlite_cs!\ :!*,cs.*,@cs.cc.*\ :Tc,Wn:/news/bin/archive-sqlite.pl cs
# mirror mirrorpost!/mirrorpost,netnews.cs.nctu.edu.tw\ :!*,nctu.talk,tw.bbs.campus.nctu\ :Tc,Wf:/news/bin/mirrorpost.pl nctu.talk tw.bbs.campus.nctu
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innfeed.conf
Used to control the innfeed program
Three types of entries: key/value, peer, group (as incoming.conf)
• peer <name> {
# body
}
• <name> is the same as the site name in „newsfeeds‟
If you do not specify -y in „innfeed!‟ entry in newsfeeds, then …
In newsfeeds
In innfeed.conf
NCTUCSBBS/bbs.cs.nctu.edu.tw,BS2\ :!*,cs.*,tw.bbs.*,twbbs.*,taiwan.*,nctu.*,mailing.*, :Tm:innfeed!
group BBS { max-connections: 2 streaming: false port-number: 7777 peer NCTUCSBBS { ip-name: bbs.cs.nctu.edu.tw } }
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readers.conf (1)
Specify access control for nnrpd
Two types of entries: parameter/value, configuration groups
• <parameter>: <value>
No way to continue a line on the next line, and no way to have a value longer
than about 8,180 characters
• Configuration groups
auth: provides mechanisms to establish the identity of the user
access: given the user's identity, what that user is permitted to do
readers.conf is a two-step process
• Put all of the auth groups first, and all of the access groups below, last match
• A user identity, as established by an auth group, looks like an e-mail address
"<username>@<domain>“
• When matching access groups the last matching one in the file is used to
determine the user's permissions
http://www.eyrie.org/~eagle/software/inn/docs-2.5/readers.conf.html#S4
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readers.conf (2)
auth group
• Generate the user identity like
<UNKNOWN>@EVERYWHER
liuyh@NCTUCSCC
nnrpdauthsender
• http://www.eyrie.org/~eagle/software/inn/docs-2.5/readers.conf.html#S2
auth "EVERYWHERE" { hosts: "*" default: "<UNKNOWN>" default-domain: "EVERYWHERE" } auth "NCTUCSCC" { hosts: "bsd*.cs.nctu.edu.tw, linux*.cs.nctu.edu.tw, sun*.cs.nctu.edu.tw" default-domain: "NCTUCSCC" res: "ident -t" }
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readers.conf (3)
access group
• newsgroups vs. read + post
• access: R(read)、P(Post)、I(IHAVE)、A(Approver)、N(NEWNEWS)、L(post to non-local posting newsgroups, [jnx] in active)
• http://www.eyrie.org/~eagle/software/inn/docs-2.5/readers.conf.html#S3
access "READING_LIMIT" { users: "*@*“ access: "R" read: "!*,cs.help,freebsd.*,gmane.*,mailing.*" } access "CS" { users: "*@NCTUCS, *@NCTUCSCC, *@NCTUCISCC, *@NCTUCSIECC“ access: "RP" newsgroups: "*,!control*,!cs.prsystem,!cs.cc.*,!csie.cc.*,!cis.sysadmin.*,!csie.sysadmin.*,!cis.computer-center.staff,!cis.syslog.*,!cis.bbs.admin.*,!junk" }
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cycbuff.conf
Define the cyclical buffers that make up the storage pools for CNFS
• To use any sysbuff larger than 2GB: --enable-largefiles
Formats
• cycbuffupdate:<interval>
• refreshinterval:<interval>
• cycbuff:<name>:<file>:<size>
No longer than 7 characters in <name>, and than 63 in <file>
<size> is the length in KB (2GB=2097152)
cycbuff:BIG80:/home/news/cycbuffs/BIG80:524288
cycbuff:BIG81:/home/news/cycbuffs/BIG81:524288
dd if=/dev/zero of=/home/news/cycbuffs/BIG80 bs=1k count=524288
• metacycbuff:<name>:<buffer>[,<buffer>,...][:<mode>]
Mode: INTERLEAVE(default) or SEQUENTIAL
metacycbuff:BIG8:BIG80,BIG81
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storage.conf (1)
Contain the rules used to assign articles to different storage methods
Format
• <methodname>: tradspool、timehash、timecaf、cnfs、trash
• <storage_class>: a unique number in 0-255 to identify the storage
Used in expire.ctl, timehash, and timecaf
• <options>: only for CNFS to specify the metacycbuff name
method <methodname> { newsgroups: <wildmat> class: <storage_class> size: <minsize>[,<maxsize>] expires: <mintime>[,<maxtime>] options: <options> exactmatch: <bool> }
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storage.conf (2)
An example
method tradspool { newsgroups: cs.cc.* class: 0 } method cnfs { newsgroups: cs.*, eecsep.*,nctu.* class: 1 size: 0,8191 options: NCTUCS } method cnfs { newsgroups: comp.*,humanities.*,misc.*,news.*,rec.*,sci.*,soc.*,talk.* class: 2 options: BIG8 }
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overview
ovdb.conf
• Parameters for tuning ovdb, no need to modify
buffinedxed.conf
• <index>:<filename>:<size> entries (similar to cycbuff)
• <index> is unique in 0-65535, <size> is in KB
overview.fmt
• No longer used by INN since v2.5
• Use extraoverviewadvertised and extraoverviewhidden in inn.conf
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expire.ctl (1)
Default configuration file for expire and expireover, define how long
• History entries for expired or rejected articles are remembered
/remember/:<days>
• Articles stored on the server are retained
<wildmat>:<flag>:<min>:<default>:<max>
– if „groupbaseexpiry: true„ in inn.conf (default)
– Last match
– <wildmat>: ! and @ not permitted, and only a single expression
– <flag>: M(moderated)、U(unmoderated)、A(all)、X(delete from all groups)
<storage_class>:<min>:<default>:<max>
– if „groupbaseexpiry: false„ in inn.conf
– <storage_class>: defined in storage.conf, „*‟ to specify a default for all classes
<min>, <default>, <max>: decimal number of days, fraction is allowed or „never‟
<min>, <max>: come into play with an „Expire:‟ header
<default>: used as the expiration period for most articles
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expire.ctl (2)
An example
# Keep expired article history for 11 days, matching artcutoff plus one. /remember/:11 # Most articles stay for two weeks, ignoring Expires: headers. *:A:14:14:14 # Accept Expires: headers in moderated groups for up to a year and # retain moderated groups for a bit longer. *:M:1:30:365 # Keep local groups for a long time and local project groups forever. example.*:A:1:90:90 example.project.*:A:never:never:never
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moderators
Determine submission addresses for moderated newsgroups
Format
• <pattern>:<address>
• First match for <pattern>
More specific patterns should be listed before general patterns
• <address>: a simple e-mail address
At most one „%s‟ may occur and be replaced by the name of the newsgroup,
with all „.‟ in the name changed to „-‟
## CS moderated newsgroup cs.computer-center:[email protected] ## Public hierarchies with exceptions. ffm.*:%[email protected] fj.*:%[email protected] medlux.*:%[email protected] ## Direct all other public hierarchies to the master moderator database. *:%[email protected]
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innreport.conf
Configuration file for innreport
Default parameters
• section default:
html true;
title "Daily Usenet report for mynews";
footer "Local contact: usenet@mynews";
html_css_url "innreport.css";
A lot of options for report content and appearance
Control Messages
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Control Messages (1)
Cancels are handled internally by INN
Others are processed by controlchan (newsfeeds)
• The actions of controlchan are determined by control.ctl
ftp://ftp.isc.org/pub/usenet/CONFIG/control.ctl
• newgroup、rmgroup、checkgroups
control*
• control
• control.cancel
• control.checkgroups
• control.newgroup
• control.rmgroup
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Control Messages (2)
Authenticate control messages based on the „From:‟ header
• Obviously perilous and control messages are widely forged
• Many hierarchies sign all of their control messages with PGP
• controlchan knows how to do this (using pgpverify) without additional
configuration
PGP key import
• ftp://ftp.isc.org/pub/pgpcontrol/PGPKEYS
• $ gpg --import PGPKEYS
• $ ln -s ~/.gnupg ~/etc/pgp
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Control Messages (3)
Path: csnews2!csnews.cs.nctu.edu.tw!news.cs.nctu.edu.tw!ctu-peer!ctu-gate! news.nctu.edu.tw!newsfeed.berkeley.edu!ucberkeley!solaris.cc.vt.edu!news.vt.edu!guardian.oit.duke.edu!news.glorb.com!news2.glorb.com!usenet.stanford.edu!usenet-its.stanford.edu!bounce-back From: [email protected] Newsgroups: sci.physics.acoustics Subject: cmsg newgroup sci.physics.acoustics Control: newgroup sci.physics.acoustics Approved: [email protected] Date: Sat, 15 May 2010 13:00:01 -0700 Message-ID: <[email protected]> X-PGP-Sig: 2.6.3a Subject,Control,Message-ID,Date,From,Sender \011iQCVAwUBS+79QsJdOtO4janBAQGNsAP7BAj2Vl4LS2RoIZmYTfHc9GFg/nFve8Hj \011iOYqpW+WiF7pI6JaNzPaeS/Y3Dh7G9HRjjhuYbQ/+bTUHWeDItRFBbGVe3t+yXEv \011TbQ/NqWqMug/OKujGsOs9wy1HQKZBErDIfxCf+XD6JenRccrBPAZoCMdSFieztZe \011vFU9B4Az+ew= \011=d9AE Xref: csnews.cs.nctu.edu.tw control.newgroup:168581 For your newsgroups file: sci.physics.acoustics\011Topics in acoustics and vibrations.
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Control Messages (4)
control.ctl
• Last match
• Format
<type>:<from>:<newsgroups>:<action>
• <type>: all, newgroup, rmgroup, checkgroups, …
• <from>: match the „From:‟ header
• <action>:
doit、drop、log、mail、verify-pgp_userid
• Encoding of newgroup and checkgroups control messages
/encoding/:*:nctu.*:big5
/encoding/:*:tw.*:big5
/encoding/:*:fido7.*:koi8-r
/encoding/:*:fido.*:utf-8
/localencoding/:utf-8
• Checkgroups
/maxdocheckgroups/:*:*:10
More on INN control and operations
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Start and Stop
Before starting, check the configurations
• $ inncheck -a -v -f -pedantic -perm
/usr/local/etc/rc.d/innd
• su -fm news -c "/home/news/bin/rc.news start"
• su -fm news -c "/home/news/bin/rc.news stop"
If you run nnrpd separately
• su -fm news -c "/home/news/bin/nnrpd –D"
• su -fm news -c "killall nnrpd"
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Reload the configurations
Using ctlinnd
When INN is running
• To get your incoming feeds working
Edit incoming.conf
$ ctlinnd reload incoming.conf 'reason„
• To get your outgoing feeds working
Edit newsfeeds and corresponding innfeed.conf or nntpsend.ctl
ctlinnd reload newsfeeds 'reason„
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Create/Remove Newsgroups
Use control messages
Use ctlinnd
• Create
ctlinnd newgroup <group> [ status [creator] ]
Add the description in db/newsgroups
• Remove
ctlinnd rmgroup <group>
Optional remove the description in db/newsgroups
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news.daily
Perform a number of important Usenet administrative functions
• Producing a status report with innstat
• Removing old news articles (with expirerm if the delayrm keyword is
specified)
• Purging the overview database with expireover if the corresponding eponym
keyword is specified
• Processing log files and rotating the archived log files with scanlogs
• Processing innfeed dropped files with procbatch
• Renumbering the active file with ctlinnd
• Rebuilding the history file with expire
• Removing any old socket files found in the pathrun directory
• Collecting all the output and mailing it
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mailpost
A program to feed an e-mail message into a newsgroup
• Read a properly formatted e-mail message from stdin
• Feed it to inews for posting to a news server
Normally, mailpost is run via mail aliases
• freebsd-acpi: "|/home/news/bin/mail-post mailing.freebsd.acpi"
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Further reading
INN 2.5 Documentation
• http://www.eyrie.org/~eagle/software/inn/docs-2.5/
INN changes and upgrade information
• http://www.eyrie.org/~eagle/software/inn/docs-2.5/news.html
INN 2.x FAQ
• http://www.eyrie.org/~eagle/faqs/inn.html
Cleanfeed
• http://www.mixmin.net/cleanfeed/
