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Emailing a Newsletter. Looking for a way to send to an alternate webserver if first one is down

We email newsletters and ads for multiple companies
We are looking for a way to ensure that when the recipient clicks on a link in the newsletter they will get the information either from the primary website or from a secondary website
For example if the link points to domainnameA.com and that site is down it will automatically go to domainnameB.com.
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emery_k
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emery_k
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Richard QuadlingSenior Software DeveloperCommented:
As you cannot change the actual address in the request (the URL in the email), you have to have some sort of fall over support with your ISP.

I would talk to them.

A few things.

1 - Sync. Make sure both servers are upto date. Any changes you make to one server have to be mirrored.
2 - Separate web and DB servers. This allows a cluster of web servers to work with a cluster of DB servers. Syncing each type is done within the cluster.
3 - Buy this service from someone like akamai.

If you have real time access to the DNS data for the 2 domains, then you could have a little script running which examines the state of domain A and if it cannot find it, alters the DNS to domain B.

This should alert you or your admin people to take a look at the problem.

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emery_kAuthor Commented:
I'd not really expected a good solution as I'd researched this prior to asking
Even with a script to change the DNS it would be down for the time it took to propagate
Possibly a way using dynamic dns but still not what we were hoping for
(I could ask for winning lottery numbers too couldn't I)
Thanks for the comments though
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Richard QuadlingSenior Software DeveloperCommented:
If you get the winning numbers, I want half.
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