Re: Running own mail server

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On Fri, Nov 03, 2006 at 12:37:44 -0800,
  jdow <jdow@xxxxxxxxxxxxx> wrote:
> 
> If it goes down for an extended period of time, as with a power loss
> and the UPS ran down, then when the UPS and machine come back up say
> a day or two later it will take a long time for the various DNS servers
> to find it again. It's better to have someone providing secondary
> name server for you. It's usually cheap. And you can configure it to
> update from your name server when you change your server's data.

Only if you conside "long" to be a couple of minutes. Negative cache entries
aren't supposed be cached very long. While there are some ISPs that ignore
TTLs, I haven't heard of many that cache negative entries for extended periods
of time.

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