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Date:      Tue, 31 Dec 1996 22:35:19 +0100 (MET)
From:      News Subsystem <news@news.toplink.net>
To:        richards@herald.net (Richard Stanford)
Cc:        freebsd-isp@freebsd.org
Subject:   Re: Usernames (was Sendmail, POP3 & RADIUS, etc.)
Message-ID:  <199612312135.WAA23952@news.toplink.net>
In-Reply-To: <Pine.A32.3.91.961231151032.121818A-100000@future.dsc.dalsys.com> from Richard Stanford at "Dec 31, 96 03:13:13 pm"
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Hi

> On Tue, 31 Dec 1996, Samara McCord wrote:
> 
> >  How do I explain to company A that the user name: "joeblow" is
> > not available because company B has already used it?  Only by making
> > the POP user name (and hence the /etc/password name) so ugly that they
> > don't confuse it with an email address (and in fact, not useable as an
> > email address), and then training them to use POP user names as strictly
> > internal and then we can map whatever domain-specific email name (i.e.
> > return address) they want into that 8-character ugly name.
> 
> Sell it as a security feature.  Point out that you allow, say, 25 character
> mail names and web addresses (for non-virtualhost customers) and alias them.
> 
> Then tell them that their login name to your servers is ________ (or let them
> pick one) for security reasons to protect their account.  And if they want
> it to be the same as their <9 character mail/web name -- let them.  If it's
> available.

We call the pop accounts customername01 -- customername99 where customername
is a 6 character thingy WE make up from whatever they call themselves.  

We use a sendmail hack from somewhere off the net works with a db file of 
email addresses to accounts. We call it /etc/maildomains for lack of a
better name ;)

	##
	## customer a
	##
	info@customera.com	custa1
	webmaster@customera.com	custa1
	bla@customera.com	custa2
	foo@customera.com	custa3
	customera.org		nonexistent

	##
	## customer b
	##
	info@customerb.org	custb1
	webmaster@customerb.org	custb1
	bla@customerb.org	custb2
	foo@customerb.org	custb3
	customerb.org		nonexistent

The nonexistent bounces unlisted email addresses.

/etc/maildomains gets converted to a db file using this;

	ck@toplink1: {44} cat /usr/local/sbin/make.maildomains 
	#!/bin/sh
	cd /etc
	if [ -f /etc/maildomains ]; then
		makemap -v hash /etc/maildomains.db < /etc/maildomains 
	else
		echo "file missing: /etc/maildomains"
	fi

This is our sendmail.mc file

	include(`../m4/cf.m4')
	VERSIONID(`@(#)toplink1.mc      1.1')
	OSTYPE(bsd4.4)dnl
	MAILER(local)dnl
	MAILER(smtp)dnl
	MAILER(uucp)dnl

	FEATURE(use_cw_file)dnl
	FEATURE(mailertable)dnl

	LOCAL_CONFIG
	Kmaildomains hash /etc/maildomains.db

	LOCAL_RULE_0
	R$+ < @ $+ . >          $: $1 < @ $2 > .
	R$+ < @ $+ > $*         $: $(maildomains $1@$2 $: $1 < @ $2 > $3 $)
	R$+ < @ $+ > $*         $: $(maildomains $2 $: $1 < @ $2 > $3 $)
	R$+ < @ $+ > .          $: $1 < @ $2 . >

You don't have to put the domains into the w class.  

Greetings
Christian

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