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
