Varun Varma wrote:
Note that luser_relay specifies a single local address. ^^^^^^^^ The problem is that these accounts are not local.
Yes - but quite often often you get a case where the guy wants these accounts both on the LAN and on the remote mailserver (say central MX).
Are you referring to mirroring just the user accounts or also the account data? If the latter, how do guarantee synchronization? Have been considering MailSync/iSync...any thoughts?
Also, if you use luser_relay, you render yourself open to having your mailboxes stuffed up with junk and your mail spool overflowing the next time someone dictionary attacks your domain, trying to send mail to random addresses at your domain.
And the possibility/severity of that is no more than, say, a catchall account.
What I've built before at a previous job is a mailhub sort of setup where all the hubs perform reciprocal backup MX for each other, and route addresses internally using mailertables (because they had two interfaces - a low bandwidth 64kbps internet connection and a much fatter leased line between each of the branches - bombay, pune, cochin, coimbatore).
A central LDAP server was used to provision addresses, so that all branches had a view of the userdb (which also served as an address book, after quite some work to make sure outlook would understand the results returned by the ldap server ... no matter that netscape understood it without that work, and the mailserver understood it too ... a few people used outlook and they'd scream bloody murder.
Exactly the kind of setup we have for a client, except that the LDAP database also holds the Unix and Samba account information. We are working on rolling out an AFS or Coda [or even Unison] based solution which will also mirror user's data across sites so that they will roaming "profiles" over different locations. The locations are all within the NCR and people travel to different sites frequently.
-- Regards, Varun Varma --------------------------------------- Mindframe Software & Services Pvt. Ltd. http://www.mindsw.com ---------------------------------------
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