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Email failover plan ... help???

Posted on 2004-04-26
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Last Modified: 2012-05-04
ok - need advise. i am not sure what i am trying to do is possible but
anyone, someone, pls advise...

we have a exchange server in the office, we are currently subscribed to two
broadband services, with different ISPs. i was thinking whether it is
possible to add both the broadbands' router as gateways in the mail server?
what i would like to have is a backup broadband to receive emails in the
event the first one is down....i have added a MX record to point to the
secondary broadband.

also, remote users to be able to retrieve their e-mails via pop3 by pointing
to the secondary broadband, in the event the first one is down?

advise pls...thanks
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Question by:chbin
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bwinzenz earned 50 total points
ID: 10920636
Without going into great detail (because not a lot of detail was provided), as long as both routers have rules to forward smtp (port 25) and/or other services (such as POP3, IMAP) to the Exchange server's internal IP, you don't need to do anything for inbound mail.  What you would need to do for outbound access is simply add another default gateway with a different cost (metric) to the server.  If you go into the IP address properties, you will notice that the first gateway typically has a metric of 1.  You should be able to add the other router with a metric of say, 2.  That way, if the first gateway is down, it should re-route outbound through the second one.  Of course, this should be tested to make sure that it works correctly.

Ben
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