Sendmail + LDAP Rouing

CHANGELOG:	

	* Thu Dec 20 2001
	- Initial roll-out

SYNOPSIS:

	Quick HOWTO for hooking up sendmail to LDAP for mail routing

DESCRIPTION:

	

REQUIREMENTS:

	Sendmail compiled with LDAP support. Check by running:

	godzilla:~# sendmail -d0.1 -bv root|grep LDAP
	 Compiled with: DNSMAP HESIOD LDAPMAP LOG MAP_REGEX MATCHGECOS MILTER

	
COMPILATION:

	Assume that Sendmaili is compiled with LDAP soupport. Most distros i
	tested came with LDAP compiled in by default.

INSTALLATION:

	Assume that sendmail is installed.

CONFIGURATION:

	Edit sendmail.mc and add the following into it

	FEATURE(`ldap_routing')
	LDAPROUTE_DOMAIN(`example.com')
	define(`confLDAP_DEFAULT_SPEC',`-h"ldap.example.com" -b"o=example.com"')

	The "FEATURE" flag should be before any "MAILER" flags in the .mc file.
	Genearate the .cf file and restart sendmail. 

	Sample LDAP entries:

	dn: uid=shanu, o=example.com
	objectClass: inetLocalMailRecipient
	mailLocalAddress: shanu@example.com
	mailRoutingAddress: shankerbalan@mailhost.example.com

	This will send redirect all mails for "shanu@example.com" to
	"shankerbalan@mailhost.example.com". The MX is automatically looked by
	sendmail for mailhost.example.com

	dn: uid=shanu, o=example.com
	objectClass: inetLocalMailRecipient
	mailLocalAddress: shanu@example.com
	mailhost: in.example.com

	This would relay mail for shanu@example.com to the same address but
	redirect the mail to MX records listed for the host in.example.com
	(unless the mailertable overrides).


	dn: uid=shanu, o=example.com
	objectClass: inetLocalMailRecipient
	mailLocalAddress: shanu@example.com
	mailhost: in.example.com
	mailRoutingAddress: shanker.balan@in.example.com

	Same as above, except that the mail will be relayed to in.example.com and
	delivered to shanker.balan@in.example.com.

	dn: uid=blr.example.com, o=example.com
	objectClass: inetLocalMailRecipient
	mailLocalAddress: @blr.example.com
	mailHost: in.example.com
	mailRoutingAddress: blr@example.com

	All mails destined for the virtual domain "@blr.example.com" will be
	relayed to "in.example.com" to the mail address "blr@example.com"

TESTING:

	Just try sending mails. It should resolve all addresses.
	
SEE ALSO:

	1. Sendmail cf.README
	2. LDAP Routing	Made Easy
	http://sendmail.net/ldaprouting.shtml
	3. Sendmail + LDAP HOWTO
	http://www.iconimaging.net/~jradford/sendmail/sendmail-ldap.html

BUGS:

	Dunno

TODO:

	Migrate other flatdbs to LDAP

AUTHOR:

	Shanker Balan
	http://shankerbalan.com/