Question : Dual Static IP addresses for one E-mail server

Hello all:

    I'm hosting an E-mail server (and web server) for a client of mine.  It has about four different domains on currently.  I want to have redundant Internet connections, so I now have a static IP address from the cable company (primary connection) and a static IP from a DSL line from the phone company.  My question is, how is the best way to set up the DNS, MX records, routers, etc. to have the quickest cut-over should my primary Internet connection go down?  Server is running RedHat Enterprise 5.

Answer : Dual Static IP addresses for one E-mail server

Well any way you look at it, you real solution here is in lowering your DNS timeouts (by using the previously explained methods), which will force changes to your DNS records to be propagated across the net within 5 minutes or so...  This will allow you to switch the DNS record for your pop3 server to whichever static IP address is currently live online...  

In the easiest deployment, once accomplishing the above, you would then just need to simply adjust the settings for your DNS in your name server manually whenever necessary.

Beyond that it sounds like you may be limited due to your access to the server.  You could employ perl scripts to notify you or change your dns settings for you if thats a possibility.  You may be able to find other scripts or utilities that could do the DNS adjustment for you, but in the end somehow adjusting your DNS is your only real solution without throwing money at the problem...