-Original Message-
From: Chris Jordan [mailto:[EMAIL PROTECTED]]
Sent: 26 June 2002 14:35
To: Exchange Discussions
Subject: RE: Exch 5.5 Backup Server?
You might need to define what you mean by Backup mail server.
If you mean a message store (e.g. Exchange's Information Store) where
e-mail gets delivered and placed in a users mailbox... then you can't do
this with Exchange.
If you mean a routing server, then you are continuing the idea that
e-mail is delivered across a network on a store and forward basis - each
server in the chain gets the message, and then hands it onto the next
server when the next server accepts it. At any store/forward point the
e-mail can get delayed waiting for the next server to be ready. This
delay can be seconds or days, depending on configuration. Typically, any
store/forward routing server will also have a time-out, so that mail
that has been delayed for too long can be returned as non-deliverable.
Now, in your situation, you are preparing to accept e-mail addressed to
your company, even though the final destination (the Exchange
Information Store) is not available. You will then be responsible for
delivery of that e-mail.
This could be done by a simple Win2000 IIS SMTP router; or by accepting
it into an Exchange Bridgehead server.
All that the Bridgehead means is that within your Exchange Site (not
necessarily in the same location) you have a server responsible for all
incoming and outgoing mail into that Site. Sometimes this bridgehead is
the only server in the Site; sometimes it is just one of the servers
(with user mailboxes on it as well); sometimes it is a dedicated server
within the Site whose only purpose is routing mail between Sites.
Cheers, Chris
-Original Message-
From: Rob Berger [mailto:[EMAIL PROTECTED]]
Sent: 25 June 2002 20:05
To: Exchange Discussions
Subject: Exch 5.5 Backup Server?
I would like to create a backup mail server in our Boston, MA office in
case our Columbus, OH office server becomes unavailable (due to server
failure or Internet problems). I am still at the design stage, so I
would love suggestions. (I checked the MS newsgroups but found nothing
useful.)
Environment Assets:
-Exchange 5.5 SP4 server on WinNT4 SP6 in Columbus handling all incoming
and outgoing mail for our small company. -This server is behind a
Netscreen firewall. All mail is directed to the Exchange server by the
Netscreen device. -I will put in another Netscreen firewall in the
Boston office to allow constant VPN connection between the 2 offices. I
would configure the Netscreen similarly to direct all mail to the
BostonMail server. -Columbus has a 3mbps Internet connection -Boston has
a DSL connection (speed unknown)
Design:
-I will modify the MX record on file with our host such that if the
Columbus mail server is unavailable, mail will be delivered to the
Boston IP address. -As long as the Boston server can accept mail until
the Columbus server is back online (or rebuilt), I'm happy. If
BostonMail will actually deliver it, that's fine, too. -What is a
bridgehead server? Is this a situation where I'd use this feature? -How
do I make sure the servers have synchronized mailboxes/addresses?
Thanks for all suggestions,
-Rob
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