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ISP Failover

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ISP Failover - 26.Jul.2012 4:14:48 PM   


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Joined: 26.Jul.2012
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I am new to these forums. This is more of a high availability question but that category doesn't appear under the Exchange 2003 forum. Therefore I have picked Message Routing as my second choice. Also, I have seen my question posted around the net but each thread seems to fall short from answering my question.

Recently we had our Internet go hard-down due to a fiber line being cut somewhere on our block. That has spurred my employer to pushing this ISP failover project on my lap. I am posting here because my largest concern has to do with my Exchange server over all else.

We have our mail delivered to us through a mail protection service. So our MX record points to this service prodiver, whom filters our mail and passes the rest to us. However, we send mail directly to the recipient's mail server (not through the mail protection service). We do not have a Smart Host setup.

We intend to bring a second ISP line into our house LAN from another provider, and if the primary line is down, we would like to have mail sent and received through the secondary line.

Assuming I setup a failover port on my SonicWALL TZ210. What would I have to configure on my Exchange 2003 server? And are there chances that I will get blacklisted when I send mail through another ISP (thinking about reverse-DNS and that stuff)?

Your responses are much appreciated. Thanks in advance!
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