On 19/07/10 22:18, Simone Caruso wrote:
Il 19/07/2010 22:56, Jonathan Tripathy ha scritto:
Hi Everyone,
My question isn't directly a Postfix issue, however postfix will be a
fundamental element, and any advice would be appreciated.
I need to set up an infrastructure which uses a mixture of Linux, and
Windows (exchange server).
Basically, for a single domain, I wish got some users to have accounts
on a Linux mail server (Something similar to
http://workaround.org/ispmail/lenny), and some to have accounts on an
Exchange server. The level of interaction between the 2 machines should
be such that users on each machine can send email to the users on the
other (As well as external mx servers of course).
The users who have their account on the Linux server, will access their
email via IMAP (and send via SMTP). The users of have their account on
the exchange server will access their email via "Outlook Anywhere" -
this is where Exchange encapsulates RPC inside HTTPS packets, and runs
the connection on a single port (443).
My current train on through is this: Have all incoming email terminate
on the Linux (Postfix) box. For users who have their account on the
Linux box itself, this will automatically work. For users who have their
account on the exchange server, I can use Postfix Virtual Aliases to
"forward" the mail to the account on the exchange box. The exchange box
would have to be set up with accounts that are non-accessible from
outside (e.g. us...@domain.local). Regarding access from outside, I'm
thinking of just placing the 2 servers in a DMZ, and using a single
static IP address, port forward 25 (SMTP), 110 (IMAP) to the Linux box
and and 443 (Outlook Anywhere) to the exchange box.
Does this sound like an acceptable solution?
Thanks
You can setup an user database (ldap, sql) and select a different
mailbox transport on domain or user basis.. you can use imap proxies
as well.
Hmm interesting, so you are saying that I could have a Postfix "front
end" (which handles incoming mail from third parties only) which
forwards mail to the correct server based on user? So 3 servers in total
then?
That's incoming mail from third parties sorted, but what about sending
mail? I'd just forward a port to the Linux Mail Server (not the
frontend) and get users to send mail through that? (This would be for
users who have their account on the Linux Mail Server. The exchange box
does everything on a single port)
