MAILPOST(8) InterNetNews Documentation MAILPOST(8)
mailpost - feed an email message into a news group
mailpost [-a addr] [-b database] [-c wait-time] [-d distribution] [-f
addr] [-m mailing-list] [-p port] [-r addr] [-x header[:header...]]
The mailpost program reads a properly formatted email message from
stdin and feeds it to inews for posting to a news server. newsgroups is
a whitespace-separated list of group names to which to post the arti-
Before feeding the article to inews, it checks that the article has not
been seen before, and it changes some headers (cleans up some address
headers and puts ‘‘X-’’ in front of unknown headers).
If the article has been seen before (mailpost records the message-id of
each articles it handles), then the article will be silently dropped.
Other errors will cause the article to be mailed to the newsmaster.
Normally mailpost is run by sendmail(8) via an alias entry:
local-mail-wreck-bikes: "│<pathbin in inn.conf>/mailpost
-d local local.mail.rec.bicycles.racing"
If the -a flag is used the value given is added to the article as
an Approved header.
If the -b flag is used, then it defines the location of the
database used to store the message ids of articles sent on. This is
to prevent articles looping around if a news to mail gateway sends
them back here. This option may be required if the mailpost process
doesn’t have write access to the news tmp directory (the value of
pathtmp in inn.conf(5)).
The -c flag indicates a length of time to sleep before posting. If
duplicate messages are received in this interval (by any instance
of mailpost using the same database), the article is only posted
once, but with Newsgroups: header modified to crosspost the article
to all indicated groups.
If the -d flag is used the value given is added to the article as a
The -f flag is a synonym for the -r flag.
If the -m flag is used the value given is added to the articles in
a Mailing-List: header, if such a header doesn’t already exist.
Specifies the port on which nnrpd is listening, used for article
posting. If given, -p is passed along to inews.
A heuristic is used to determine a reasonable value for the Path:
header. The -r flag indicates what to use if no other value can be
A colon-separated list of additional headers which should be
treated as known headers; these headers will be passed through to
inews(1) without having "X-" prepended.
Written by Paul Vixie long ago and then hacked up by James Brister for
$Id: mailpost.8,v 18.104.22.168 2004/01/25 23:44:19 rra Exp $
<pathdb in inn.conf>/mailpost-msgid.db database file
Is lacking in configurability.
active(5), inn.conf(5), nnrpd(8), uwildmat(3).
INN 2.4.2 2004-01-25 MAILPOST(8)
Man(1) output converted with