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Date: Thu, 15 Aug 1996 22:39:30 -0400 (EDT)
From: Mark Mathis <mark@earth.mat.net>
To: "Jun, Gyu-Chang" <geoid@ktnet.co.kr>
cc: questions@FreeBSD.ORG
Subject: Re: Virtual mail hosting?
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On Fri, 16 Aug 1996, Jun, Gyu-Chang wrote:
> 
>   Now, here is the question. Is it possible to set up virtual mail host?
>   I think if I set Cw record in sendmail.cf, aaa@www.aaa.com and
>   bbb@www.bbb.com can be handled. My point is that ONE FBSD box can accept
>   mail for webmaster@www.aaa.com and webmaster@www.bbb.com simutaneously..
> 

What you will need to do is first modify sendmail.cf to deal with two 
databases in the /etc directory that will handle the aliasing.

add these two lines to sendmail.cf

Kvirtualhosts btree /etc/virtualhosts.db
Kvirtualmasqs btree /etc/virtualmasqs.db

add this rule set for the return mail masq

S40
     
R$* < @ $* > $*         $@ $1 < @ $2 > $3       already fully qualified
#bc instead of automatically using $M, lookup masquerade in virtualmasqs
R$*                     $: $(virtualmasqs $1 $: $1 @ $M $)
#bcR$*                  $: $1 @ $M              add local qualification
R$* @                   $: $1 @ $j              if $M not defined

add this rule set for the virtual hosts

S98 

################################
# sendmail for virtual domains #
################################

R$+ < @ $+  . >         $: $1 < @ $2 > .
R$+ < @ $+ > $*         $: $(virtualhosts $1@$2 $: $1 < @ $2 > $3 $)
R$+ < @ $+ > $*         $: $(virtualhosts $2 $: $1 < @ $2 > $3 $)
R$+ < @ $* > .          $: $1 < @ $2 . >



for inbound mail:

create /etc/virtualhosts with your favorite text editor, there can be 
as many lines as you want for each virtual host.

virtdomain.com			john@mydomain.com   (all mail goes to john)
sam@virtdomain.com		sam@mydomain.com
webmaster@virtdomain.com	bob@other.domain.com (forward mail to 
							third system)

create the database virtualhosts.db from virtualhosts with the makemap 
command (makemap comes with sendmail)

makemap btree virtualhosts.db <virtualhosts

for outbound mail (they need an account on your system)
create /etc/virtualmasqs (if you use PINE do this in setup)

frank	frank@virtdomain.com
gloria	gloria@virtdomain.com
fred	fred@virtdomain.com

create the database virtualmasqs.db from virtualmasqs with the makemap 
command

makemap btree virtualmasqs.db <virtualmasqs


****************************************
EACH TIME YOU ADD ANOTHER VIRTUAL DOMAIN
****************************************
(this is from part of the instructions I give sysop's on our system)

5. Add Cw line in /etc/sendmail.cf

	Cw new.domain.com

6. Add alias to /etc/virtualhosts

	webmaster@new.domain.com	account@real.domain

	run command:

	makemap btree virtualhosts.db < virtualhosts

7. if they have an account on our machine and want mail to look like it 
is coming from their domain.

	add alias to /etc/virtualmasqs

	username	anyname@new.domain.com

	run command:

	makemap btree virtualmasqs.db < virtualmasqs

8. restart sendmail

	get the pid with

	ps -aux | grep sendmail

	run command:

	kill -HUP sendmail.pid





******************************************************************************
  /\	Mark Mathis	Micro Access Technologies  "Behind every successful
 /\/\	Mark@Mat.Net	PO Box 92224               cat is an obedient owner"
/\/\/\	202/529-5001	Washington, DC  20090
******************************************************************************