batfastad -> Setting up a mail failover - routing mail through SBS (20.Jul.2006 12:40:09 AM)
At the moment we have our mail delivered to our static IP by our provider (PlusNet) and mail gets collected in a queue at their end when our server's unavailable.
However we now have a need to move our domain names away from PlusNet's hosting.
I did the following with a test domain...
I have full control of all our domain name records at our new host so what I've tried to do is set up the MX records...
The primary MX record points to our exchange server
The second MX record keeps the mail within the hosting providers system, and since they use cPanel I've created a mailbox and routed it so all undeliverable mail gets delivered into that mailbox.
I've set up the POP3 connector so it connects to that mail account every 10 minutes, which it does, and downloads the mail according to the event log.
I've added the test domain name to the recipient policy - and added some test addresses to some exchange mailboxes. Internal mail gets routed fine to those addresses - so the internal exchange side of things seems to be working correctly.
However the mail downloaded from the failover POP3 account I created, all ends up in the administrator mailbox.
Is there a reason for this?
Why does the internal mail get routed correctly, but mail downloaded from the POP3 account just get dumped in the administrator mailbox?
But when mail does manage to get sent to the primary MX record (directly to our exchange server), it gets routed fine!
Our exchange server will probably be contactible 80-90% of the time (apart from if traffic's too heavy or something), but I just wanted to get this failover set up correctly.
I did at first think it might be because the way the catch-all default address works in cPanel was it was stripping out the To: header, meaning exchange didn't have anything to go on to work out where to route the mail, but on closer inspection of the mail when it's sitting in the POP3 mailbox, the header is still correct.
Any help will be greatly appreciated!