On Sat, 2010-09-04 at 12:11 +0530, Ashwin Muni wrote: > I am using exchange and want to migrate to postfix, The issue is > users should be authenticated from Active Directory and other thing is > i have got 1000 users from which 150 users will remain on exchange and > the rest mailboxes will be created on postfix (Linux Box). the 750 > users are actually not very important. > > > If user has mailbox in AD deliver > in Ad > || > =================(4)========================================== > || > || > [ ][ ]=======(3)=<=========[ > ] [ v ] > (1)--> Port 25 ][ Postfix ] Authentication from AD [ Active > Directory Box] ===========[ Exchange] > [ ][Linux Box ]==>===(2)=========== > [ ] > [ ] > || Else Deliver on Postfix Machine > (5) > || > [ v ] > [ Storage on Linux Box ] > [ ] > > 1. Mail Entering Postfix machien using Port 25 > 2. Authentication from AD if user exists and mailbox location > 3 Results from AD > 4. If user on Mailbox on exchange then deliver to echange > 5. Else Deliver to postfix >
Why do you want to query AD in real-time. Micro$$oft AD implements ldap very poorly and you will waste time on your postfix server waiting for AD replies. Instead do this * Ldap Query the Ad server in the cron and get list of all valid users with mailboxes. * create a transport file to deliver only these users to the Exchange Rest to your local delivery .. I assume you use lmtp -----------/etc/postfix/transport exch_us...@domain.tld smtp:[exchange.server.ip] exch_us...@domain.tld smtp:[exchange.server.ip] exch_us...@domain.tld smtp:[exchange.server.ip] ... .. domain.tld lmtp:/path ------------ * Just make sure the unknown users are rejected at the smtpd level before the mail enters inside. Thanks Ram > Any help appreciated. > > -- > Ashwin Muni > http://www.linuxmaza.com > Linux Tutorials and Howtos
