On Tue, 9 May 2000, Don Knott wrote:
> On Tue, 9 May 2000, Pete Peterson wrote:
>
> > We have a RedHat Linux mail gateway which receives all incoming mail from
> > the outside and then relays most of it to other machines, including mostly
> > Micro$oft Exchange servers for Outlook victims.
>
> I just went through a similar problem. We use HP's Openmail on
> Redhat (unix replacement for Exchange) to serve Outlook clients.
>
> First we set up the procmail stuff from:
>
> http://www.wolfenet.com/~jhardin/procmail-security.html
Thanks!
By the way, the procmail man page shows how to set this up. After a
little bit of refinement, you end up with:
============================
Implementing procmail on a sendmail 8.8.8 gateway:
(Note: This is still undergoing testing and refinement)
1. Add the following delivery agent:
Mprocmail, P=/usr/bin/procmail, F=DFMmShu, S=11/31, R=21/31, T=DNS/RFC822/X-Unix,
A=procmail -m MAIL_FROM="$_" MAIL_TO="$u" $h
[TAB]---^
2. Add the following to ruleset 0:
# pipe through procmail for processing
R$*<@example.com>$* $#procmail $@/etc/procmail/filter.rc
$:$[EMAIL PROTECTED]$2
R$*<@$*.procmail>$* $1<@$2>$3
[TAB]-------------^
Vary the domain name and script name (/etc/procmail/filter.rc) for your needs.
3. Here is a sample filter.rc file:
#
# procmail rules to filter mail on a gateway
#
LOGFILE=/var/log/procmail.log
NL="
"
LOGABSTRACT=no
POISONED_EXECUTABLES=/etc/procmail/poisoned
INCLUDERC=/etc/procmail/html-trap.procmail
:0
* ^From:.+\/[^ ,]+@[^ ,]+
{
FROM="$MATCH"
}
:0 # pass along all other mail
! -oi -f "$FROM" "$MAIL_TO"
--
John Hardin KA7OHZ ICQ#15735746 http://www.wolfenet.com/~jhardin/
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-----------------------------------------------------------------------
"Bother," said Pooh as he struggled with /etc/sendmail.cf, "it never
does quite what I want. I wish Christopher Robin was here."
-- Peter da Silva in a.s.r
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