That's a different category of problem. :) Obviously when you get large
enough you want to have more than one critical facility. But the idea of
a "main" data center and a "backup" data center is very 20th Century.
Hot/hot with well-tested failover procedures is the way to go.
Doug
On 3/1/15 4:37 PM, Noel Butler wrote:
Backups still do make sense, but only if off-net in case your DC is
completely unreachable, I've always run one, privately and commercially,
and none of them really see much spam for a few years now, perhaps
because the spammers of yesteryears think much like you do John :)
On 02/03/2015 08:47, John Levine wrote:
By the way, why do you have a backup MX? These days, it's hard to
keep the spam filtering on the backup in sync with the primaries, and
anyone who's not a spammer will wait and retry for long enough that
you're going to get all of the real mail. Backup MXes made sense in
the 1980s when networks were flaky and there were a lot of servers on
intermittent dialup connections. They don't make much sense now.
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